Originally posted by: MiniGolfIsFun
In a must win situation, I'd go with 2 Dark Knights and 1 Alchemist.
But to answer your question, just play normally and don't worry about which dress sphere is useless. However, I might add that I think the most useless dress sphere is probably Warrior since Dark Knight is just so much insanely stronger and tougher and can damage multiple enemies at the same time.
Gunner can be useless pretty much the entire game if you don't get a certain item at the end, but then that item makes the game *VERY* easy (like kill just about anything in the first couple of shots).
Blue Mage is kinda pointless since the best skills that can be learned are too toublesome to get cuz you have to be hit with it FROM THE ENEMY to learn it. i.e. Mighty Gourd
Thief is may also be pointless because you can get a Garment Grid that lets anyone use Mug.
Samurai is decent but overall not that great compared to Dark Knight.
Berserker is pretty much in the same rank of Samurai.
Songstress is pretty much the most useless Dress Sphere. The dancing effects only last as long as the turn so there are no lasting effects. Even a Songstress that throws out items would be more useful. However, I'll add that I like to see them dance anyway so I really don't mind it. Ha Ha.
Oh, and Black Mage is pretty weak also. Not only does it take forever to try and max out, but most enemies take the same amount of damage from Dark Knight's Darkness.
However, really just play it normally. Make sure you visit everyplace on each chapter at least once.
You can turn off transformation after you've oggled at them the first 10 times or so.