The Thief/Ninja and Monk are of very little use to me. And for at least 1 Magic Level I do feel like I need all 4 available White Magic Spells.

I remember my first play though I went in ignorant of the Downside of the Red Mage, only seeing the "He can do both" factor and had a Red as my only Mage. I completely screwed myself, though was still able to beat it.