DDing: Berserk always up. Stick Keen Flurry -> Godsbane, Blindside -> Path of the storms and Blood for Blood ->Whirlwind. I don't personally have the ARC abilities but guess you should slap Quelling Strike on either Whirlwind or Godsbane for maxed hate reduce (and some TP?) and use Chameleon when needed.

There's also a thread about MRD DPS.