I'm thinking Dark Knight's rework will be more extensive than I initially thought.

[Shurrikhan]

Sheltron already exists, and hasn't broken the game. It is dps and mitigation positive. TBN is nearly there in doing the same thing as sheltron. There are plenty of ways to work said skills into the game, one idea that comes to mind is to make its use dark arts style frequency, used often and with additional effects.

Shelltron merely increases the immediacy of a proc you'd already likely have in little time. TBN is still technically a dps loss, even if an rDPS gain. Neither precedents outright stealing stats from an enemy for a (however brief) burst window.

Again, depends on multiple variables. How often is it up is one of the single most important variables. If it is up frequently and as part of dark knights resource generation then you could easily have it up for when you want it. And it could end up filling a hole in dark knights current kit, which is what do we do with fluff damage. Again everything depends on how it is implemented.

Frequency doesn't change the fact that enemy burst and raid burst are not synced. "When you want it" is itself the issue. It will most likely have to be balanced around receiving the best of both worlds, while rarely reaping the best possible value of either.

And what would it have to do with "fluff damage"? You'd specifically want such an effect to occur where it can be maximized, i.e. your burst, enemy burst, or ideally both at once.