Well, since this thread is about FFI: DOS, not FFI NES, I'll focus on that.
So far I've beaten the game with the following parties:
Knight/Ninja/White Mage/Black Mage.
Knight/Master/Red Mage/Black Mage.
Ninja/White Mage/Black Mage/Black Mage.
Currently playing:
Warrior/Red Mage/White Mage/Black Mage.
Red Mage/Red Mage/Black Mage/White Mage.
I must say, I still don't like teh Monk/Master of Red Mage/Wizard. The Master's defense is really quite sad, and he was the only person who died in my game (He died about 10 times). Also, since INT now affects the damage of spells, my Black Mage and White Mage are consistently doing more damage/recovering more health than the Red Mage. His attack is also lower then the Warriors, so I don't see the point of taking one except to try every party. There, that should be it.