At the start of the game, I only used them when I got desperate. GFs are better concerning Junctioning and so it's FAR more important to use that factor of their usefulness.

Honestly, if you overuse them, then you're ruining half the fun. Save them for bosses (Especially the BF-thing at the Missile Base on Disc 2. That one is a bugger sometimes (at least for me ) Okay?)

Try to look past the immediate "Easy" route and dig deeper. I did, and I'm still digging. I love this game.