Actually, you should put almost everyone at the back row, I mean...

Terra --- she uses Magic. Morph doubles it. Unless you want to use Atma Weapon then, oh well.

Locke --- he can use 'back row' weapons and I don't think capture affects his damage at back row. I rarely played Locke.

Edgar --- Tools. no effect.

Sabin --- Blitz, no effect.

Shadow --- Throw, no effect.

Strago --- Lore, no effect

Cyan --- Swordtec, no effect.

etcetcetc...

The only people I find a need to place at the front line are Gau, maybe Gogo, maybe Umaro. That's all =\