I was thinking, could honestly put groups of 3-4 targets, let the game mark them so that it's easier to program NPC behavior, and give the tank a party to protect. If anyone dies, fail, and have the healer npc heal noone but the tank.

Yes, similar instances would be nice for all classes, but tanks need it the most. Carrying a bad dps through almost any instance is easy, but i'm tired of tanking on my scholar from healing agro. If i get dps'ing agro, I deserve it.