Super-Casting Pretenders?

[SelfishGene]

I was reading in the manual the section on passive spell benefits one night when a use for the relatively unloved Phoenix pretender occured to me. Since Air adds precision Air and Fire could have a synergy together, and since Fire's biggest weakness is a lack of precision it seemed logical to try them together.

Wow. 9 Fire/9 Air makes a Phoenix that is even more effective than a trample Pretender in the early game. Fire Darts that kill two or three enemy units every attack . Its lovely to see fire spells being tossed with close to perfect accuracy across the whole battlefield. Sadly no faction chooses both Air and Fire together except for the occasional random pick.

Ive read about the Super-Combatant Pretender builds; has the idea of a Super-Casting Pretender been explored? I'm not terribly familiar with late game dynamics and so uncertain as to a Casting Pretenders' functional longevity.