I never really have much trouble with him, just stick him Back Row and leave him to his spell casting. Most of the time you can just use Osmose to fill up his MP fairly quickly (2-3 turns), and you rarely need to be casting Level 3 spells every turns, so I don't really run into the low MP problem. Other than that he's your typical mage with low physical attributes.

Plus the Magus Sisters and Dark Elf would have been a pain without his White Magic.