The fact that its possible to complete it without ever having to summon... well I wouldn't know. But to do that you would have to miss out on LOTS of side quests and secret aeons. so use the aeons, especially the magus sisters, bahamut and anima they're definately my favourites in battle.

I have mentioned in another forum about being coherant when tryin to argue a point intelligently to deserve any kind of consideration. I dont wanna have to write it out again!