I would strongly suggest to rewrite this page to account for Enmity and Stamina. As it currently stands the damage formula is misleading. There are 8 Multipliers that should be taken in consideration and not 4.
- Normal ATK
- Normal Enmity
- Normal Stamina
- Omega ATK
- Omega Enmity
- Omega Stamina
- EX ATK
- EX Enmity
All those values are multiplied with each others. You don't straight add up normal stamina into the "normal boost" total otherwise Stamina would be worthless when the boost is 15% at maxHP and any Big ATK boost normal at SL15 would give 18% without the Stamina constraints. Nobody would even bother to use Stamina is those numbers would feed into the same total. The same applies to enmity.
Simple exemple: If you have one Murgleis (22% ATK) and one Fimbul (15% ATK at 100% HP), the total boost provided will be 1.22 * 1.15 = 1.403. And NOT 1+(0.22+0.15) = 1.37.
Summons affect each of these value individually BEFORE they are multiplied together. If you have a Varuna 120 equipped, using the above example: Murgleis will give 2.2 * 22 = 48.4% ATK (meaning a 1.484 multiplier) and Fimbul will be 2.2 * 15 = 33% ATK (becoming a 1.33 multiplier), the overall boost would then be 1.484 * 1.33 = 1.974.
And on top of all of that Elemental boost from summon gets applied separately to all the above.