Originally Posted by
Wolf Kanno
Blue Magic is cheaper, just as powerful, and doesn't have minute long attack in VII, in VIII, its great to level them but you gain abilities with or without using them as attacks and in the end, a party with a great set-up can do more damage in the time it takes Eden to perform its attack. I found Garnet and Eiko to be more useful as dedicated healers than use their summon magic (Though Fenrir does have some usefulness until you get auto-haste) cause Vivi and Steiner are just that broken, and the Aeons in X are "I win" buttons. Not even counting the optional summons, you can still finish the game with little problem with Bahamut as a crutch.
They are nice eye-candy but I find that most of the time there is always a better and more efficient option in the games. Its for that reason that having the espers in XII deal excellent damage but easily killed didn't really bother me. In fact, the challenge of making them useful and their more chaotic nature made them more exciting for me. This of course is just my lousy opinion though. :eep: