Buff merciless resolve
Hit structured entropy
Crippling grasp
Weave Swallow soul with medium destro atracks
Fire spectral arrow
Reapply merciless
Back to weaving Swallow soul
Repeat that, keep entropy and cripple up as much as possible.
Don't forget to hit entropy before an Ult for the 20% extra damage.
I like shooting star as an Ult. You earn it super quick.
That's my rotation. No dps counter on xbox, but it seems to work well