Basically it tries to combine these aspects:
Mobility (tactical advantage, evasive fire, smoke screen)
High AoE damage (Multishot, Fan of Knives, Archery)
High Single target damage (Rapid Fire, Cull the Weak, Archery)
Versatile damage sources (physical, lightning, poison)
Good CC (Web Shot, Fan of Knives)
Survivability (smoke screen)
Sustainability (Bat Companion, low cost Fire at Will, few discipline spenders)
Vs big groups, AoE with Multishot.
Vs single target, use evasive fire + rapidfire (webshot) to slow + kite.
Surrounded? Fan of knives to slow, evasive fire to escape (2 seconds increased speed), unload with multishot.
In over your head? Smoke screen and GTFO.
Fan of Knives lets multishot work with cull the weak.
Web shot works well with cull the weak to move the base damage to 262% damage.
Tactical advantage should proc easily with evasive fire and it is almost the only discipline spender.
Bat companion with lowish cost spenders should make using the hatred generator not required as often. If hatred doesn't turn out to be a problem, switching to ferret or MfD is an option.