Why did you not mention pally?

Great buffs, plate, Rez, 3 mob tanking and most efficent heals in game I think

Them shaman have massive mana issues.. Having BoW would be nice and also dispells

I don't think leveling as enhancement would work. The alts don't follow close enough to get into melee range. 1 melee and 4 casters would serve you best I think. The melee needs to be your main so you can get in range easy