Oh, you were joking, sorry.

Anyway, why are you deciding upon which classes to use on beforehand? This isn't FF1, you can change jobs whenever you want to, you know, and if it's your first time playing the game, wouldn't you want to explore many different job combinations? Many times you'll find other parties far more capable than the pre-set combinations you've set out.

Although by all means, play the game the way you feel like, but I just don't see the point in deciding on beforehand.