I just made it to the end game with my wizard strategy and boy did things pay off. I had been doling out every bit of my sov's essence to heroes and only leveling their inteligence and essence. After several hundred turns I have about twenty wizards, each with the best summoned creatures, fire based elementals and I am quite honestly unstoppable. I don't even need a regular army or realy to send my wizards outside of the city gates.
I had envisioned such a life for my kingdom since beta 4 and things are finally shaping up. I can't tell you how happy it makes me to send 15 fire elementals at the Umber. Hehe... they have no idea what I am capable of. The key now is to mod in some staves and cloaks to really make my magic pop. I am thinking a spell for civ wide armor and hp bonus that uses an enchant slot to represent the meditation my wizard must do to maintain the spell. Just thought I'd share a really fun way to play.