What do you mean by cost too much? Like take many sphere levels to get to?

ya i do depending on wht they do in the party... but in the long run u cover the whole thing anyway... i try 2 make sure tht they hve enough hp so they dont die easily...

I`ve always had everyone go throu their own SG.... except for Kimahri of course, who`m I had once go for Wakka`s, another one throu Tidus` and anothe rone thro Auron`s...         I liked him going throu Tidus`... having 2 hastegas is OP, and you know it... my partys were always flexible, I had everyone equally lvled... Rikku sucked, btw... best thing she could do was customize my armour... and in battles? steal maybe =/