For me it would be Fighter, Red Mage, White Mage, Black Mage. Yes, yes, I know the Red Mage is **** later on but the first half of the game is the toughest and having double black and white magic really helps in places like the Ice Cavern (I didn't shiver from the cold, ****ing Mindflayers). Fighter of course is there to take the hits and give 'em, Whitey's there for the healing and the B. Mage is necessary for craving up multi enemies.
It was a pretty kick ass team.
