Ultima (can blms have it please)

[Kabooa]

to add to what others have said, it's alluded to that the Ultima used by Ultima Weapon and the final boss of the SB 24 man raid have a connection. also worth noting that in every FF game Ultima appeared in as a player spell it has always been less cost efficient/less powerful than most other tools you would have at that point. going all the way back to FF2.

This is a mechanical restriction of the game's damage cap.

By this logic almost all summoning and magic becomes obsolete by the time your Fighters get Genji gloves and Excalibur and Ragnarok.

And because Tactics is mentioned specifically, Lightning stab.