Team Building

Team Building is a core system in Granblue Fantasy. Your party consists of the main character, 3 front line characters, 2 back line characters, 1 main weapon, 9 sub weapons (known colloquially as the "grid"), 1 main summon, and 4 sub-summons.

Each character, weapon, and summon has its own statistics and abilities to consider. Combining all these factors into a competent party is a very satisfying experience when you are able to take that party and see it slowly progress and improve, allowing you to take on harder and harder content.

※ This article is a general guideline. Specific grid compositions and optimal main character classes and main weapons may vary based on your party composition, main weapon options, and available summons. For a beginner's list of cookie-cutter grids to pursue, see Basic Grids.

Characters

A character's strength largely depends on your weapon grid and their synergy with other party members, rather than their individual stats. Because a player's character availability depends on what their Premium Draw pulls and what events or side stories they've cleared, it is impractical to recommend specific characters or party combinations here.

A few key points to consider while picking characters for your team:

Capping DEF Down: Learning how DEF Down Stacking works is extremely important. Many players will use Miserable MistInflict 25% ATK DownATK is lowered
Strength: 25%Base Accuracy: 80%Duration: 180 secondsStacking: Dual and 25% DEF DownDEF is lowered
Strength: 25%Base Accuracy: 80%Duration: 180 secondsStacking: Dual on all foes. (from the Row III class Dark Fencer) as a subskill on the Main Character for 25% DEF DownDEF is lowered
Strength: 25%Stacking: Dual. Because it is a "dual-sided" debuff, it will stack with other types of DEF Down until the -50% cap is reached.
Multiattack Buffs: Commonly referred to by players as DATA (Double Attack/Triple Attack). Having multiattack is vital—it means more attacks per turn, and less turns to your next Charge Attack. Characters who can multiattack more reliably should be placed before characters who can't; each character who uses their C.A. fills the charge bars of characters after them by 10%, allowing those characters to use their own C.A.s even if they weren't at 100% charge bar at the start of the turn.
- In later-mid grids, grids can also gain multiattack options by slotting in certain weapons. Most notable are the Atma Weapons, which can use a Strife Key to boost DATA for all characters that have a proficiency in its weapon type.
Charge Attack Effects: Characters' Charge Attacks may have special effects, such as a party-wide buff or a buff for its user. Characters with party-wide buffs may want to be placed in the second or third slots so more characters will be immediately affected.
Synergy with one another: Taking note of each character's gimmicks and working around them is key to making team-building more fulfilling. Does someone have a stacking buff that dispels if they take damage? Slot in a tanky character who draws hostility towards themselves so the first character gets targeted less. If a character's kit revolves around constantly charge attacking, pairing them with characters that supply Charge Bar +Instantly boosts Charge Bar by
or Charge Bar Gain UpCharge bar gain is boosted
will help with that.

Weapons

See also: Basic Grids

A party's element is decided by the equipped main weapon; the types of main weapons that can be equipped are decided by the main character's Class. The remaining nine sub weapons (the grid) can be freely equipped and are not limited to the main weapon types.

Because Weapon Skills are far more important than an individual weapon's stats, grid progression relies on strengthening single-element grids, then working on other elements' grids as one gets stronger. While building early-game grids, first raise the skill levels on a newly-obtained weapon, then add it to your grid until you have enough (usually 5-6). After you have that base grid down, then you can uncap weapons with copies.

There are a few weapon series that will almost always have a place on your grid; most of these are crafted through Shop > Weapon Series:

Seraphic Weapons (early game): These weapons have one for each element and bring an extremely important boost to total damage against their effective element: 10% as an SR weapon, 20% as an SSR weapon. They can (and should) be added to the party even as SRs.
- Dark and Light Seraphic weapons have steeper unlock and uncap requirements than the other four Seraphic Weapons, requiring the What Makes the Sky Blue II: Paradise Lost side story to be completed first.
- Unlike most other weapons, Seraphic Weapons are solely uncapped through trading in materials in the Shop. While their levels will be raised by regular upgrading, each ★ cannot be raised through conventional means.

Bahamut Weapons (mid game): While these weapons are always Dark-element, their skills take effect based on character race rather than element, so they will find a place in every applicable team. Unknown and Primal characters will be buffed by any Bahamut Weapon, so it is encouraged to look at your overall teams to decide which one to craft.
- The side story What Makes the Sky Blue will give players a free SSR Bahamut Weapon of their choice, instead of having to craft one from SR to SSR. It is highly encouraged to make your first Bahamut Weapon selection there, despite its relatively late main story unlock requirement. Most players recommend selecting Dagger of Bahamut Nova because Human is the most common race, with Erunes second (who will also be boosted upon upgrading the dagger to Coda).

Atma/Ultima Weapons (mid-late game): Like Bahamut Weapons, their skills are not based on element. They instead provide HP and ATK boosts based on a character's weapon proficiencies; a character with two proficiencies will be boosted by either (or both) Atma Weapons. (The main character's weapon proficiencies are based on class and are the same as the main hand weapons.)
- Atma Weapons can gain an additional skill by trading for Gauph Keys. Only one key can be equipped at a time; the most common pick is the Strife Key for its multiattack rate boost.
- Atma Weapons can be upgraded into Ultima Weapons, but this requires being High Level. Upon upgrading to Ultima, it can gain a second additional skill with an Ultima Key.
- Due to the large amounts of Sword proficiency characters, Atma Sword is a common first pick. Other Atma weapon selections will heavily rely on your character composition.

Dark Opus Weapons (rank 120+): Extremely flexible weapon after its 4★ and 5★ uncaps. Each element has two variations of the weapon for its base skill: one has an Omega modifier while the other has a Normal modifier. Notice that it is possible for an Omega modifier 5★ Dark Opus weapon to be good in a Normal grid; due to the difficulty in obtaining one, players should carefully consider their options before committing to it.
- Like Ultima Weapons, they have slots for two additional skills that can be unlocked using items after their uncaps. Although identical damage cap boosts will not stack (for example, if both Ultima and Dark Opus skills grant a 15% boost to CA DMG Cap, you only gain a 15% boost), the two weapons are not mutually exclusive and can be used to raise different damage caps.

Beast Weapons from the event Rise of the Beasts will vary in use. Fire, Water, Earth, and Wind all have two weapons with Normal modifiers and one Omega weapon. Light and Dark both have one EX weapon each: Huanglong Gauntlet and Qilin Sword, and both have a second skill that reduces damage taken from their advantage element.

Xeno Weapons: These weapons have the one of the strongest EX modifiers in the game, as well as 4★ uncaps that make them even more powerful than regular EX weapons. However, the infrequent appearances and short duration of Xeno Clashes, can make them difficult to acquire for new and even mid-level players.

Cosmos Weapons (rank 150+): Fully-upgraded Cosmos Weapons are a strong option for grids that use a large number of the same weapon type. They offer a 50% multiplier to the ATK and HP stats (including the stats from Plus Bonuses) of weapons of its type, as well as 1% boost to damage cap for every matching weapon. A general rule of thumb is to have at least 5 of a given weapon type in your grid before considering adding a Cosmos Weapon.
- A common Cosmos Weapon grid is the Lumi Sword Grid, which uses a Cosmic Sword with 4-6 Luminiera Sword Omega, one True Purity Sunblade, the Sword of Renunciation, and optionally Ultima Sword and Hollowsky Blade.

Summons

The main summon will be picked for its aura. For new players, an elemental ATK-boosting summon is ideal, but as players progress, switching their main summon to a weapon skill boosting summon is preferred. For example, in an Omega team, using a 3★ Omega summon will be preferable over a 50% Elemental Attack boost summon.

Sub summons, meanwhile, have much more freedom. The only benefit gained from matching their elements to the main weapon's is a 3-turn initial cooldown cut. Otherwise, unless they have a sub-summon aura, they are mainly being used for their call or for their stats.

For most battles, a Support Summon will be selected before fighting. The Support Summon's aura will affect your party unless otherwise stated, so it is best to choose a summon that complements your team. (For example, teams with an Omega main summon will usually pick an Elemental summon.)

Some notable summons:

Carbuncles are the only premium draw SR summons to see common use. A 3★ SR Carbuncle is much easier to obtain than its SSR equivalent (Epic Series), and have an extremely good call (50% Elemental ATK Up and 50% Elemental DMG Cut of its element). In certain difficult fights, players may equip up to three 3★ SR Carbuncles of the element they're fighting for the damage cut.
White Rabbit and Black Rabbit are staples for EXP farming in Shiny Slime Search!. While both are technically free, White Rabbit requires Rare Monster farming to trade for it in the Treasure Trade Shop, while Black Rabbit only has one copy obtainable from Arcarum: The World Beyond and needs to be uncapped with Moonlight Stones.
Belle Sylphid is another commonly-used SR summon, used for Rare Monster farming. She is only obtained through Rare Monster drops. (With the addition of Rare Weapons for upgrading Siero's Shop in Unite and Fight token drawboxes, however, Belle Sylphid has fallen out of favor.)
Huanglong and Qilin are a set of farmable summons that are extremely useful at 3★.
Summons that can only be used once per battle (Genesis Series, Freyr, Typhon) often have very strong calls. Uncapping these with duplicates is usually inadvisable unless you have enough copies to 3★ at once. (Even then, depending on the summon, you might not want to do that.)
Non-ticketable summons almost always have extremely good auras and/or calls.
- The
  Primarch Series
  all have sub-auras that raise the damage cap against their advantage element. (Note that this is not the same as Seraphic weapons, which boost final damage. However, they are still worthwhile for player progression.)
- Bahamut and Lucifer are highly-regarded for their 4★ and 5★ calls. Although Sunlight Stones can be used to raise them to 3★, their uncaps beyond that require gathering the necessary the materials; there is no skipping through it.
- The
  Optimus Series
  are the cornerstone of Primal grids and should not be reduced even if you have no immediate plans on building a Normal grid. There are weaker free substitutes in the Demi-Primal series obtained through What Makes the Sky Blue II: Paradise Lost, but you can only select one summon and it will still need Sunlight Stones to uncap.
- New players commonly use Kaguya for her autorevive; experienced players commonly use her for her boost to item drop rate (and, at 4★, her boost to EXP gain). "Double Kaguya" means a person is using Kaguya as both a main and support summon to maximize drop rate. Players without their own Kaguya can use an SR Rabbit as their main summon.
Arcarum Summons take a long time to uncap due to the Arcarum's time-limited nature; however, all the summons have sub-auras that may prove extremely useful. Although many of them have situational calls, The Sun (SR) and The Hanged Man (SR) are notable for being all-around strong summons.
- At the end of the lengthy Arcarum Summon upgrade process are the Arcarum Evokers, so some players may want to pick their summons based on the Evoker of their interest.

For more information on general Summon tiering, see the appropriate links in the Resources section.

Omega Grids

Omega (Magna) grids make use of weapons and summons that are all farmable. Most new players are suggested to build these types of grids first, since there are no specific Premium Draw requirements to it.

The following are general guidelines for grid building progression. As the grid meta can shift greatly depending on new content and updates, these guidelines cover common advice given to players up to Omega II grids and is not a strict rule to follow.

(Last updated: March 17, 2019)

Progression

Early Game (Omega I/M1):

Early game grids depend on drops from Omega Raids. Every four chapters in the Main Quests up to Chapter 48, players will receive a free level 100 Omega SSR weapon as a completion reward; however, not all of those weapons are good. (See each element's respective Basic Grids for advice on them.)
Filler weapons and summons from early Side Stories can be used as placeholders. Most side stories give a level 100 copy of an SSR weapon upon story completion, and a 3★ level 1 copy of the summon. (Side stories with multiple weapons or summons will require you to farm the others.)
Before obtaining enough copies for a 3★ Omega Summon, using an Elemental summon may provide better damage.
After obtaining a 3★ Omega Summon, with enough skill leveled Omega weapons in the grid, using an Omega main summon and an Elemental support summon will bring better yields than Elemental x Elemental. See the Damage Formula page for details.
Start the Seraphic Weapon upgrade process as soon as possible.
See Basic Grids for more detailed examples.

Late Pre-High Level (M1):

Most Normal-skill side story weapons should be replaced by this point.
Xeno Weapons and Proving Grounds weapons should be farmed out whenever possible, preferably uncapped to 4★, to replace story event EX weapons.
- Due to the limited availability and irregular scheduling of those events, they should be farmed out regardless of grid progression unless you are absolutely certain you will not need them.
Accumulated renown pendants should be used towards Celeste Claw Omega or Luminiera Sword Omega, which have the lowest drop rates of the Omega weapons.
- Unlike other M1 weapons, which should be skill leveled and placed into the grid before uncapping, Luminiera Swords should not be used until High Level, after its 4★ uncap and raised to level 120 for its second weapon skill.
Arcarum: The World Beyond should be unlocked at this point. Each Arcarum difficulty has an increasingly high SSR weapon drop rate, and can provide weapons desirable for your grids. Arcarum (Sephira) weapons may be used as grid placeholders if you have difficulty getting the right raid drops.
Upgrade the Seraphic Weapons whenever possible. The only uncap unavailable to pre-HL players is the SSR uncap, which requires Elemental Centrums from Omega I Impossible raids.
It is possible, but difficult, to complete an Atma Weapon at this stage by hosting Ultimate Bahamut (Raid).
Fire and Dark grids may begin including Ancient Ecke Sachs ×5 and Ancient Cortana ×1 from Tier 1 Summon Raids. However, the drop rate on these raids is low and the only way to purchase them is with High Level Prestige Pendants. Completing a regular M1 grid is higher priority.
- Fire is the only grid to make a full transition to an Ancient weapon due to the strength of crit and enmity skills found in Ancient Ecke Sachs. A 0★ AES can replace a 3★ Colossus Cane Omega outside of 1-turn teams.
- Some Water grids may include Ancient Auberon, but it is less common. Ancient Nalakuvara, Ancient Artemis, and Ancient Perseus are usually not used outside of 1-turn teams, where only one copy of the weapon would be used.
- There are two types of T1 Summon weapons: regular (have a glow in surrounding the weapon its artwork) and Ancient (no glow). Ancient versions have Omega skills while regular versions have Normal skills. Make sure to distinguish them!

Early High Level (M1):

Light grids will transition from Luminiera Bolt Omega to Luminiera Sword Omega. Some other Omega weapons can be raised to 4★, but they are not high priority due to upgrading costs.
Finish Seraphic Weapon upgrades.
Prestige pendant farming in early High Level is difficult, so spending it on Class Distinctions for Row IV and Extra II Classes is higher priority. Spare prestige can be used to purchase Ancient Ecke Sachs from the pendant shop (2/month, 1000 prestige). You may also choose to save them for an eventual Omega II (M2) weapon.
Most of early High Level will still be spent farming regular Omega raids. Omega I Impossible raids are farmed for centrums and host crystals for Omega II raids, but are rarely farmed for weapon drops.

High Level (Omega II/M2):

After reaching rank 120, Impossible Omega II Raids (M2) and Lucilius (Raid) are unlocked. M2 weapons drop from host, MVP, or blue chests, and can also be bought with 4000 prestige pendants. Dark Opus weapons are acquired by trading drops from the Lucilius raid; note that Omega grids will always want the "Renunciation"-name weapons.
Typical M2 grids wildly differ in their use of M2 raid weapons. Fire barely uses any in favor of AES, while Earth almost completely replaces the original M1 grid. Like the Ancient weapons, M2 weapons usually have a weaker attack skill in exchange for different skills like HP, multi-attack, or Stamina.
Most M2 weapons will only be added to the grid after reaching 4★ because some weapon skills are only unlocked after being upgraded to level 120. The two common exceptions are your first Nibelung Horn and Last Storm Harp, which can both be added in at 0★ and then uncapped like M1 weapons.
Dark Opus weapons can take various places on a grid; for most grids, it will replace an M1 weapon.
Picking between 4★ Omega summon, 4★ M2 weapon, or 4★ Dark Opus weapon first is up to personal preference, but the summon is recommended due to affecting all your Omega weapons.
Completed M2 Earth and Wind grids will sometimes opt for Omega x Omega summons for 100% crit. Almost all other Omega teams will still prefer Omega x Elemental.

General Advice:

Remember to balance your weapon modifiers for maximum damage. The usual grid setup is 5-6 Omega, 2-3 Normal (this includes Bahamut Weapons, the Normal II Celestial Weapons, and Atma/Ultima Weapons), and 1-2 EX weapons. But due to the respective strengths of their Omega weapons, Wind teams usually contain 6 to 7, while Fire often does with just 5.
Although the guide earlier suggested using an Omega main summon and an Elemental support summon, they are interchangeable. If you have a strong Elemental main summon, it may be more convenient to use Omega support summons.
- In some cases (particularly for summons that can only be used once per raid or other powerful ones like 4★ Bahamut or Lucifer), you may still want to use your own Omega main summon, use your elemental summon as a sub summon, and bring the same elemental summon as support so you have their call twice.
Note that in the "Summon combination" part of following paragraphs, summons like Shiva (Summon) are usually interchangeable with ticketable elemental ATK summons like Sylph, Flutterspirit of Purity since they have a comparable Main Aura. For the most part, the summon call of the non-ticketable option listed is stronger, but there can be situations where it's not the case.

Colossus

Summon Combinations

Shiva (Summon) + Colossus Omega: Standard option.
Colossus Omega + Colossus Omega: Experimental option for Ancient Ecke Sachs grids, but mostly inferior because of Shiva's extremely strong call.

Notable Omega Weapons

Colossus Cane Omega (M1): Base weapon for Colossus Omega grids. It is often dropped in later-game grids for Ancient Ecke Sachs.
Sephira Emerald Dagger and Sephira Emerald Fork (Arcarum): Suitable filler weapons. Both have better stats at 3★ than a 3★ Cane.
Ancient Ecke Sachs (T1): Strong option for an alternative Colossus Omega grid focusing on enmity. Difficult to acquire, but a grid of 0★s is more effective than a 3★ Cane grid once your party drops below 85% HP.
Scimitar of Brahman (M2): Filler/utility weapon for Cane grids, usually 1-2. Powerful health booster which also provides decent DA.
Trident of Brahman (M2): Utility weapon for Cane grids. Most useful when characters in your party are desperate for DATA. Having strong multiattackers like Grea or Therese will greatly devalue this weapon.
Hand of Brahman (M2): Only relevant in a Melee-based team (e.g. Anila, Grea, Ghandagoza), and usually used as main weapon for its TA buff.
Scythe of Renunciation (Dark Opus): Extremely flexible weapon, especially after its 4★ uncap. Even at 3★, it easily replaces a Cane.
Summer's Mirage (RotB): Strong filler weapon. Even though Fire teams does not typically build around Charge Attack damage, it is still much better than Canes and the Sentence-type skill is always welcome.

Leviathan

Summon Combinations

Europa (Summon) + Leviathan Omega: Standard option.
Bonito (4★) + Leviathan Omega: Option for CA-based teams and short fights in general. Using this option to its fullest effect requires at least 3 water summons in your sub summons, as well as a 4★ Bonito.

Notable Omega Weapons

Leviathan Gaze Omega (M1): Base weapon for Leviathan Omega grids.
Sephira Emerald Blaster and Sephira Emerald Harp (Arcarum): Suitable filler weapons.
Ancient Auberon (T1): Filler/utility weapon for HP and can be the core of an alternate grid that focuses on Critical Hit, but in general not very popular.
Tyros Zither (M2): Core weapon for CA-based teams (e.g. Vajra, Grea (Summer). and Kengo). 2-5 depending on team and context.
Tyros Scepter (M2): Only relevant in a Staff-based team (e.g. Europa, Drang (Grand), Altair), used to further increase the team's Charge Attack cap.
Tyros Bow (M2): Utility weapon. Useful when characters in your party need multiattack.
Staff of Renunciation (Dark Opus): Extremely flexible weapon, especially after its 4★ uncap. Useful as a mainhand in Staff-based teams with Lily (5★) and Macula Marius, as both characters take advantage of the Staff's CA Deluge CrestWater magic is amplified (Max: 5 / Can't be removed)
stacks.
Winter's Frostnettle (RotB): Strong weapon skills but only one can be obtained, which limits its utility as both Critical Hit and Enmity are modifiers that want to be the main build of a grid, and not fillers. However, it is still a good replacement for Gaze in early, general purpose builds, and is fairly easy to obtain for new players.

Yggdrasil

Summon Combinations

Godsworn Alexiel + Yggdrasil Omega: Standard option.
Yggdrasil Omega + Yggdrasil Omega: Used in teams with at least two 4★ Nibelung Horns for the powerful Stamina multiplier and Critical Hit rate. When this option is used, sources of Earth ATK UpEarth ATK is boosted
buffs becomes increasingly powerful. Examples include the calls on Zircon Carbuncle and Gilgamesh, charge attack buffs from Ultima Sword (Earth) and Eahta, and Rosetta (Summer)'s skill.

Notable Omega Weapons

Yggdrasil Crystal Blade Omega (M1): Fundamental for early-mid Yggdrasil Omega grids. They are usually completely replaced in late-game grids in favor of Nibelung Klinge and Nibelung Horn.
Yggdrasil Dewbranch Omega (M1): Non-HL option for an HP filler weapon.
Sephira Emerald Blade and Sephira Emerald Duke (Arcarum): Suitable filler weapons. The Blade may see use as a main weapon with Sword Master/Glorybringer MC for Shiny Slime Search! teams.
Ancient Perseus (T1): Provides a huge amount of attack and solid HP, but has the drawback of lowering Double Attack. Very reliant on team composition and/or grid composition, mostly seeing experimentation in teams intended for short term battles or teams that have a high Triple Attack rate (thus negating the Double Attack decrease).
Nibelung Klinge (M2): Core weapon for Omega II grids. A direct upgrade to Crystal Blade unless it was uncapped to 5★, but even then usually the HP is worth more than the small amount of additional attack.
Nibelung Horn (M2): Core weapon for Omega II grids. Provides a very powerful Stamina multiplier in addition to a good amount of Critical Hit. When 3 of these are used with double Omega main auras, Critical Hit is guaranteed.
Yggdrasil Bow Omega/ Nibelung Messer: Utility weapon for the Enmity modifier.
Harp of Renunciation (Dark Opus): Extremely flexible weapon, especially after its 4★ uncap.
Autumn's Transformation (RotB): Strong filler weapon for Critical Hit and Double Attack, but only one can be obtained.

Tiamat

Summon Combinations

Grimnir (Summon) + Tiamat Omega: Standard option.
Tiamat Omega + Tiamat Omega: Used in teams with at least two 4★ Last Storm Harps for the powerful Stamina multiplier and Critical Hit rate. Remember that when this option is used, sources of Wind ATK up outside of your Main aura becomes increasingly powerful. Examples include the Charge Attack of Ultima Sword (Wind) and Jeanne d'Arc (Themed), Scathacha's skill and Morrigna (Summon)'s call effect.

Notable Omega Weapons

Tiamat Bolt Omega (M1): Fundamental of Tiamat Omega grids. Later-game grids will typically use 3 Bolts and 3 Last Storm Harps.
Tiamat Gauntlet Omega (M1): An option when the playstyle of your team or the context (e.g. one-turn EX+ in Unite and Fight) doesn't use Enmity.
Sephira Emerald Sword and Sephira Emerald Bow (Arcarum): Suitable Omega skill filler weapons. The Sword, like the Sephira Blade, is a useful main weapon for Slime teams; however, the Blade also gives elemental advantage against Slime Swarms for players with less ways of dealing with them.
Ancient Nalakuvara (T1): A strong option when the context requires less than 8 turns. Only use 1 due to the exclusivity of the weapon's second skill.
Last Storm Harp (M2): Core weapon for Omega II grids. Provides a very powerful Stamina multiplier in addition to a good amount of Critical Hit. When 3 of these are used with double Omega main auras, Critical Hit is guaranteed.
Last Storm Blade (M2): Niche utility weapon that's sometimes used for HP. Compared to similar limiting weapons in Omega II, Primal teams is not a thing but may become one later on. Decent mainhand for Glorybringer.
Spear of Renunciation (Dark Opus): Extremely flexible weapon, especially after its 4★ uncap.
Spring's Whisperings (RotB): An upgrade to Last Storm Blade, and the best HP filler for Wind Omega behind Dark Opus weapons.

Luminiera

Summon Combinations

Lucifer + Luminiera Omega: Standard option.
Luminiera Omega + Luminiera Omega: Can be considered if the team has four 4★ Mittron's Bows and two 4★ Mittron's Treasured Blades for the powerful Stamina multiplier and Critical Hit rate. Compared to similar builds in Wind and Earth, this option is not as strong due to the lower Critical Hit rate skills. When this option is used, sources of Light ATK UpLight ATK is boosted
outside of your main aura becomes increasingly powerful. Examples include the calls on Opal Carbuncle and Hector, the charge attack buff from Ultima Staff (Light), and the weapon skill from Huanglong Katana.

Notable Omega Weapons

Luminiera Bolt Omega (M1): Fundamental of early Luminiera Omega grids.
Luminiera Harp Omega (M1): Slightly worse than Bolt, but can be used as a substitute.
Luminiera Sword Omega (4★) (M1): Core weapon for Light Omega grids. Due to having both an Omega and Normal skill, you can use more of this weapon compared to other Omega weapons (up to 8). This also makes Bahamut Weapons in your grid less useful the more Swords you have.
Mittron's Bow (M2): Utility weapon for the Stamina multiplier. Use 0-2 depending on your ability to maintain a comfortable HP percentage. Core weapon in the Critical Hit build.
Mittron's Treasured Blade (M2): Utility weapon for the Enmity multiplier. Core weapon in the Critical Hit build.
Ancient Artemis (T1): An upgrade to Mittron's Treasured Blade, but does not have Critical Hit skill.
Sword of Renunciation (Dark Opus): Extremely flexible weapon, especially after its 4★ uncap. Replaces a Lumi Sword.

Celeste

Summon Combinations

Bahamut + Celeste Omega: Standard option.
Celeste Omega + Celeste Omega: Consider this combination when you have at least 5 of 4★ Abyss Gazes for the Critical Hit rate. Compared to similar builds in Wind and Earth, this option is not as strong due to the lower Critical Hit rate skill and the lack of modifier. Remember that when this option is used, sources of Dark ATK up outside of your Main aura becomes increasingly powerful. Examples include the Charge Attack of Ferry (Grand), Orchid's skill and Anubis's call effect.

Notable Omega Weapons

Celeste Zaghnal Omega (M1): Used in early Celeste Omega grids, or in one-turn grids lacking methods of quickly reaching Enmity (such as Zooey (Grand), Jeanne d'Arc (Dark), or Beatrix).
Celeste Horn Omega (M1): Slightly worse than Zaghnal, but can be used as a substitute.
Celeste Claw Omega (M1): Fundamental for Enmity-focused grids. Very strong even at 0★ if used with Zooey (Grand), or characters that can knock down their own HP like Beatrix.
Sephira Emerald Reaper (Arcarum): Suitable filler weapon.
Ancient Cortana (T1): Powerful utility weapon, offers a very strong multiattack buff compared to other Omega options. Each copy will reduce max HP by 10%, down to 70%, which is important to consider.
Abyss Gaze (M2): Core weapon for Critical Hit build. In general not as strong or popular as the Enmity build, but this can work well in a Stamina team with Doctor MC.
Abyss Spine (M2): Powerful utility weapon that offers ATK/HP and C.A. Cap Up, both of which are largely useful regardless of team composition. Core weapon for Charge Attack teams, which aren't as dominant as in Water but are on the rise (with characters like Clarisse (Valentine) and Nier).
Katana of Renunciation (Dark Opus): Extremely flexible weapon, especially after its 4★ uncap.

Primal Grids

Primal grids use

to boost weapons with Normal skills (e.g. Dark, Hatred and Oblivion for Dark).

These grids are usually more expensive to build than Omega ones, as Optimus Summons cannot be ticketed or even sparked, and many present-day Primal grids need high numbers of Vintage/Grand weapons to compete against Omega grids. This means that many valuable resources need to be used in building them, including Sunlight Stones and many Damascus Ingots.

Once finished, however, these grids are usually stronger than their Omega counterparts. Due to this, building Primal teams is something players should think about early on and dedicate appropriate resources towards.

Agni

Summon Combinations

Agni + Shiva (Summon): Standard option.
Agni + Agni: This option is used to greatly enhance the normal skills. It should be considered when the player have a large number of Stamina weapons in their grid (at least 3, in general 4). However, this does lose one slot for Shiva's powerful call.
As always, Demi Agni may be used to replace Agni if needed.

Notable Normal Weapons

Balmung (Side Story): Filler weapon for HP and enmity.
Crimson Finger (Vintage): Core weapon for Enmity grids, filler/utility weapon in Stamina grids for situations where high HP percentage cannot be maintained easily.
Ecke Sachs (T1): Better for double Agni builds (mainly for Full Auto teams, where Shiva's call wouldn't be used anyways).
Erichthonius (T2): Powerful utility weapon for multiattack.
Sword of Pallas (T2)/ Ray of Zhuque Regus (RotB): Filler weapons for HP.
Fire of Prometheus (T3): Filler weapon with enmity grid.
Chains of Caucasus (T3): Centerpiece of an alternate Enmity grid. 4 Chains + 2 Fire of Prometheus will provide a strong EX modifier from Grand Epic and self-damage for Enmity. Powerful but difficult to obtain enough to make the grid worthwhile, and not suited for long battles.
Ray of Zhuque Malus (RotB): Utility weapon for Damage Cap.
Benedia (Grand): Filler weapon for Double Attack. If used with double Agni, 5 of them allow to reach 100% critical hit rate. Generally not recommended.
Ixaba (Grand): Core weapon for Stamina grids.
Purifying Thunderbolt (Grand): Niche weapon for its Sentence skill. Endgame Fire teams focus less on Charge Attacks, and maxing out the Crit chance is difficult.
Scythe of Repudiation (Dark Opus): Extremely flexible weapon, especially after its 4★ uncap.

Varuna

Summon Combinations

Varuna + Europa (Summon): Standard option.
Varuna + Bonito: Option for Charge Attack based teams and short fights in general. Using this option to its fullest effect requires at least 3 Water sub summons, as well as a 4★ Bonito.
Varuna + Varuna: Used to greatly enhance Normal skills.
As always, Demi Varuna may be used to replace Varuna instead.

Notable Normal Weapons

Fimbul (Showdown): Utility weapon for Stamina modifier and HP.
Xuanwu Mace Malus (RotB): Utility weapon for Damage Cap.
Murgleis (Grand): Utility weapon for multiattack.
Taisai Spirit Bow (Grand): For a double Varuna Crit build, only 2 Taisais and 1 Galilei's Insight (or another medium Crit weapon) are needed for 100% Crit, leaving some space in grid for other modifiers. Greatly recommended for teams that aren't centered around Charge Attacks.
Galilei's Insight (Grand): Utility weapon for Stamina and Critical Hit.
Blue Sphere (Grand): Core weapon for Charge Attack based grids.
Staff of Repudiation (Dark Opus): Extremely flexible weapon, especially after its 4★ uncap.

Titan

Summon Combinations

Titan + Godsworn Alexiel: Standard option.
Titan + Titan: Used to greatly enhance Normal skills. An option for grids with a large number (2~3) of Stamina weapons. It also works well with Fandango skills to significantly raise their TA boost.
As always, Demi Titan may be used to replace Titan if needed.

Notable Normal Weapons

Solomon's Axe: Generally considered a filler weapon, but can see more use in Enmity teams.
Baihu Claw Malus/ Greatsword Andalius: Utility weapon for Damage Cap.
Stratomizer: Utility weapon for Enmity modifier.
AK-4A (Grand): A core weapon in many Titan grids, especially in ones that aren't centered around Enmity or Stamina. AK-4A's multiattack boost makes up for Earth's overall lack of it.
Ichigo Hitofuri (Grand): Core weapon for Stamina-based grids.
Mirror-Blade Shard (Grand): Filler weapon for Double Attack and HP. Rarely used outside of mainhand purposes.
Harp of Repudiation (Dark Opus): Extremely flexible weapon, especially after its 4★ uncap.

Caim

As a sub ally, the Evoker Caim provides a significant boost to stats if no weapon is used twice in the grid. This can allow for a powerful grid that requires less total Grand weapons and Damascus Ingots, and additionally benefits from 10% Cap Up. It is strongly recommended to have an Ichigo Hitofuri and AK-4A before considering this.

Zephyrus

Summon Combinations

Zephyrus + Grimnir (Summon): Standard option.
Zephyrus + Zephyrus: Used to greatly enhance Normal skills. An option for players with at least 1~2 Stamina weapons in their grid.
As always, Demi Zephyrus may be used to replace Zephyrus if needed.

Notable Normal Weapons

Qinglong Spear Malus (RotB): Utility weapon for Damage Cap Up.
Celeste Horn Omega (M1): Not ideal, but can be used as Enmity mod filler.
Indra's Edge (T2): Utility weapon for Garrison. Useful in certain situations, like soloing high difficulty raids and Lucilius (Hard).
Love Eternal (Grand): Core weapon for the high Attack modifier. Also a useful main weapon for its C.A. effect.
Reunion (Grand): Utility weapon for the high Attack modifier and HP.
Hatsoiiłhał (Malice): Utility weapon for enmity modifier and Charge Attack Damage Cap Up.
Unius (T3): 4 FLB Unius provide a large amount of Attack as well as a total of 64% EX modifier. Can be used to create a strong Zephyrus grid that requires few Grands, but generally less popular due to the time investment needed, as well as the relative strength of Tiamat grids.
Le Fay (T3): Offers a strong boost to multiattack and normal Attack in exchange for reducing max HP by 10%. Also provides an additional 16% EX modifier if used in a grid with 4 Unius.
Spear of Assail (Vintage): Utility weapon for Enmity. Rarely used as the focus of a grid but useful to have in high-difficulty content.
Vortex of the Void (Grand): Utility weapon for Stamina and more HP. 1~2 are often seen in grids.
Sky Ace (Grand): Utility weapon for Sentence and more Attack and TA. Typically used in C.A.-centric teams with Seofon.
Spear of Repudiation (Dark Opus): Extremely flexible weapon, especially after its 4★ uncap.

Zeus

Summon Combinations

Zeus + Lucifer: Standard option.
Zeus + Zeus: Used to greatly enhance Normal skills. An option for players with at least 3~4 Stamina weapons in their grid.
As always, Demi Zeus may be used to replace Zeus if needed.

Notable Normal Weapons

Luminiera Sword Omega (M1): A Lumi Sword Grid using Zeus' aura will already slightly higher damage than its Omega counterpart. However, spending Sunlight Stones for this is generally not worth it unless you plan to build a stronger Zeus grid later. Lumi Swords are also useful as filler/Omega modifiers if you have less Edens.
Huanglong Katana (RotB): Provides much-needed Elemental ATK Up in a Zeus + Zeus setup. Needs the correct team composition to work (notably with Fif).
Huanglong Spear (RotB): Powerful mainhand, especially in C.A.-centric setups.
Eden (Grand): Core weapon for Stamina focused Zeus grids.
Ivory Ark (Grand): Versatile weapon thanks to having three relevant bonuses in HP/ATK/Crit. 2 copies will allow around 90% Crit in a Zeus + Zeus team.
Certificus (Grand): Powerful mainhand, also strong weapon for C.A. teams thanks to Sentence. Useful in harder content.
Sacred Standard (Grand): Utility weapon for multiattack and Progression. Particularly effective in double Zeus setups where the elemental bonus from Progression is stronger. Only used in difficult content.
Ruler of Fate (Draw): Niche weapon that can allow for very strong Charge Attacks. Usually 1~2 can fit in a grid alongside 2~3 Certificus.
Artemis (T1): Utility weapon for the Enmity grids. Useful when running Sleipnir Shoe.
Sleipnir Shoe: Garrison skill source.
Adamantine Gauntlet (T3): Only useful in double Zeus. Requires at least 3 FLB copies.
Gungnir: Used in a 3 Adamantine Gauntlet grid to maintain high crit %.
Bow of Iliad: Used in Adamantine Gauntlet grids. If you have 3 Gauntlets, run 2 Bows; for 4 Gauntlets, run 1 Bow.
Sword of Repudiation (Dark Opus): Extremely flexible weapon, especially after its 4★ uncap.
Gambanteinn (Grand): Utility weapon for multiattack. Less commonly-used now, but keep just in case.
Ethereal Lasher/ Sunset Fan: Filler weapon for HP.
Taming Sari (Vintage): Utility weapon for damage cap.

Hades

Summon Combinations

Hades + Bahamut: Standard option.
Hades + Hades: Used to greatly enhance Normal skills. An option for players with a large number (min. 3~4) of Stamina/Enmity weapons in their grid. It's also fairly good with Unheil.
As always, Demi Hades may be used to replace Hades if needed.

Notable Normal Weapons

Gisla (Vintage): Core weapon for enmity focused Hades grids.
Cerberus Order (Showdown): Utility weapon for enmity grids with a powerful trium modifier.
Diablo Bow (Showdowns): Filler weapon for HP.
Qilin Bow (RotB): Very high attack modifier (at the cost of lower max HP) and a boost to skill damage cap. In battles where you hit damage cap and HP is not an issue, this weapon should definitely be taken into consideration.
Hermanubis (T3): Good mainhand and relevant skills. Use it if you don't have Parazonium or if you want to use Axe classes.
Majestas (Malice): Utility weapon for Garrison and HP. Mostly used for soloing high difficulty raids.
Parazonium (Grand): Extremely powerful mainhand. Skills are borderline decent to put into a grid, but not optimal.
Blutgang (Grand): Filler weapon for either Enmity or Stamina grids. A good mainhand option if long term sustain is needed.
Fallen Sword (Grand): Core weapon for Stamina grids.
Unheil (Grand): Powerful utility weapon as both HP and C.A. DMG Up are relevant. Great mainhand for harp classes and C.A.-centric teams. As it has no ATK modifiers, it's generally the last addition to an already-powerful grid.
Bab-el-Mandeb (Grand): Versatile weapon thanks to having three relevant bonuses in HP/Attack/Crit. 3 copies (or 2 copies + 2 Blutgangs) will allow 100% Crit in a Hades + Hades team.
Katana of Repudiation (Dark Opus): Extremely flexible weapon, especially after its 4★ uncap.