Quote Originally Posted by Big D
Cloud's Ultima Weapon, Cait Sith's HP Shout: HP is the key. More HP = more damage; a full HP gauge also increases damage. So basically, have 9999/9999 HP for maximum damage. 3333/9999 will be quite weak, whereas 4000/4000 will be strong. It's not just how many HP they have; it's how much they're capable of having, too.
Well, I have Cloud at Level 60 with 5000 HP. Against Crater monsters and the Gelnika Unknowns, he's already doing 9999 damage.