[Truper]

One thing you might try is two different versions. You can build an Alteration Nataraja with say A3 E3 W2. I'd personally boost A and E to 3, just to take a bit less fatigue from casting, so your Natty can stay on his feet longer, and also so that when you reach Alt 5, you can use Invulnerability. The other option is to go enchantment say F2 A4 N2. This one casts Fire Shield, Astral Shield, Personal Regeneration, Astral Weapon.

Quickness shouldn't really be necessary, as you're already getting 4 attacks per turn. I understand the point about improving the speed with which you buff, but if you're placing him at the back of the battle board, you shouldn't have much trouble.