pfft, i've done undead-strath with a 55 priest, 2 mages, a warlock and an me as an MS-warrior. (of those, the warlock and the warrior had about 50% epics, the mages were in blues/greens). as long as a couple of you know the place its fine. oh, and stuff like ventrillo helps for when you have to react fast
and btw, it cant be 10manned anymore.