DRK MT Rotation for me.

Take off Grit after first Power Slash Combo/Dark Mind
After first laser use Shadow Skin, Bloodbath
After first sets of adds spawn Dark Mind
After first jump Grit back on
Prey finishes casting Shadow Skin, 12 secs later DA/Dark Mind + Shadowall - Take off Grit - pop convalescence until jump
Grit while bombs go out and take off darkside, Darkside on after landing Shadow Skin, after prey goes out take off grit, living dead benediction to full with 2 sec left
Grit on for bombs, darkside off
Repeat Prey finishes casting Shadow Skin, 12 secs later DA/Dark Mind + Shadowall - Take off Grit - pop convalescence until boss dead

With proper rotation our healers can dps while cooldowns are up and I am not dying to Royal Founs