Well actually I found 1 great Barbarian "build". Its a Whirlwind combined with Artilery balista
You basically shoot those bolts in a nova, too bad its so rare and last so short amount of time.
And finally killed Ashava with like 2 min left, got a really strong unique axe with the WW tornadoes. I'm done with Barbarian testing, just messing with rogue for now.