I was giving the most extreme case, and I didn't factor in refreshment. But resist reduce is unnecessary. Just cast spells till you find Mystera, Prep Crystal Ball, and take Mystic Balance, Flames, and Refreshment and you're set for Avatar at least. I haven't tried Namtar, but I assume that would work for him too.
And 30 mp is REALLY conversion heavy, but I was visualizing the character as a Transmuter.
I speak chaos.