Single Target:
1) Buff up with Siphoning Attack, Relentless Focus, Evil Hunter
2) Cast Caltrops, Arrow Barrage, Poison Injection
3) Rearming Trap, Surprise Attack

When your Evil Hunter/Rearming Trap runs out, reapply it. When Caltrops are running out, swap bar and reapply Caltrops, Relentless Focus and Poison Injection. If you have to run away from the boss at any point in time, also swap to bow, reapply buffs + Poison Injection and if time allows it, also Arrow Barrage.

At 50%-0%, I keep Poison Injection up all the time so I have to swap more frequently. In this phase. I also keep Relentless Focus up. Being able to block and swap cancel your skills perfectly is especially important.

At 25%-0%, I spam Killer’s Blade while I keep Poison Injection up. Shortly before 25%, I rebuff everything so I can focus on Killer’s Blade spam :D


AoE:
1) Buff up with Siphoning Attacks, Relentless Focus, Evil Hunter
2) Cast Caltrops, Arrow Barrage
3) Rearming Trap, Steel Tornado