prep:
Weapons: Whatever
Armour: Mystiles
Materia:
Wep: phoinex
Arm:
Cloud: Kotr=HPabsorb Mime=Counter Mime=Counter
others: mime=counter mime=counter mime=counter
Attack Plan
Go in with only one person alive, no matter how you try and defeat him. Anyways, wait for Ruby to put its tentacles in the ground and use phoinex, then use kotr and get the others to mime it. it will counter with Ultima which is why you need mystiles to raise evasion. Repeat.