Multishot with Arsenal for AoE damage.
Strafe with Rocket Storm for single target damage and mobility.
Smoke Screen with Lingering Fog for defense.
Companion with Wolf Companion for additional damage and tanking.
Evasive Fire with undecided rune for damage, hatred generation, and backflip.
Marked for Death with Grim Reaper for additional damage.
Tactical Advantage for mobility(with this, you can Strafe at almost normal speed without rune!)
Steady Aime for damage.
Ballistics for damage boost for Multishot and Strafe.
The only weak link I see is that Strafe may not be good enough to deal a single target damage. However, Strafe with Rocket Storm and Ballistics deals 210% weapon damage, it is pretty cost efficient, and you can drain your hatred from max to empty in less than five seconds if you are using two one hand crossbows, which I am going to use.