Best is self explanatory
Wastes set, pride of Cassius, unity, convention of elements, either immunity or hellfire amulet, ancient parthan defenders, an bk set. With furnace, hexing pants, and obsidian in cube.
If playing solo you'll want a Occulus ring on follower as your kills will cast it even if equipped on a followe now if nothing changes from PTR.
Not sure if skull grasp will be bis now they've changed it not been on PTR nor do I doubt many or if anyone has bothered to test since the charge Barb is superior.