Also, inb4 "Being a tank prevents DRK from sacrificing HP." No, a tank role is the only role for which sacrificing HP, e.g. for burst damage or eHP conversion (Flat HP -> percentile mitigation, etc.), makes sense. On Tank, HP can be an actual manipulable resource that involves risk and reward.
On a DPS, on the other hand, it just turns into a wonky ACT-bars trade for ultimately no rDPS gain except in incredibly niche scenarios:
- Keep HoTs up on the DRK and let it soak up any excess oGCD heals you have so that it can do its normal DPS, which will ultimately be at most a healer filler attack per HoT duration higher than its competitors,
- with the grand unique feature of "in a pinch, let DRK drop itself to near-death before healable downtime, using that empty time on GCD heals on it" (so very exciting).