Quote Originally Posted by Andreil Reborn
I dont have the exact formula on hand, but in the GBA, it's power is determined by all the spell levels of your spells and weapons. Therefore, if you had all weapons at level 16, and all your spells at level 16, Ultima would deal around 9700 and something...I need to go get the actual formula, otherwise what I said means nothing.
That would be (96 + Total Skill Levels) * Ultima Skill level. Note Ultima itself is included in the skill levels total. The maximum damage it can possibly do is 7680 when used on a single target.