I still think "Bahamut Overdrive + Yuna Overdrive = pwn first and half of second form" all you need is Hastega, perhaps two characters with Zombie ward/proof armour just to make sure one character (perhaps yuna) stays zombified - hold it (brain is working).

Did no one think to cast shell on the character being affected by zombie, so that regen and the rest don't hurt so bad. If not, why not use reflect then dispel? Why did i not think of this while fighting her myself?

Is there a flaw in casting reflect on zombied characters (such as dispelling regen from yunalesca doesn't work?)?