Styrofoam, tell your friend that he sucks.

Tell him to read the Junction tutorials in the Tutorial section. That is the key in this game. Using GFs means that your stats are incredibly weak, and later on in the game he is going to get his ass kicked. I hope he does, too.

Also tell him to ditch the GFs and to start drawing/refining magic and Junctioning 100 of each spell to his stats. Depending on where he is, he should have 100 Regens, Tornados/Quake, Meltdown, Meteor, Flare, Reflect, Triple, Haste, Pain, and Aura. Once he gets 100 of each of these he will be much stronger, and he won't need to use his GFs to carry his terrible characters through the game.

The only time I ever use GFs is at the beginning when you don't have much magic or -J abilities available to you. Then I totally quit using them, except for Doomtrain (Vit 0) and Cerberus (triple casting Aura).