You can do act5 pit of Acheron with a war cry Barb if you equip an act 2 merc with reaper's toll and teleport around to position him. He can tank, slowing monsters with decrepify, while you nuke them. Works quite well IK shield throw still works well for act 5 infernos. With topazes in your gear, a good gheed's, and a point in the new mf passive you can easily reach 400% mf with an IK set.