You don't really need a tank for this combo to be successful, I've been using a rogue/ranger type who's in stealth half the time and shooting from various sides of the battlefield the other half of the time.
Wizards in this game have a huge variety of spells, massive utility, crowd control, and damage, with tons of AP regeneration wizards can do it all. Archers? Smokescreen, fireballs. Melee? firefields, poisonfields. Boss in your face? Teleport. The combinations are endless.
At the least they need to fix how HP is calculated with lone wolf + raistlin.