My lvl 60 Zeus analysis
-Keraunos sometime lower charge attack by 20%, mostly died but if any survivor, never get the DA and TA down
-Olympus doesn't give 20% damage cut
-Paralyze work from 100% or less, doesn't work from 50% below, before join HP already down to 85%~
-Is weak to charm? Vania work wonder on Zeus, until 10% less HP, then more immune or totally immune