-Keen Flurry: +40% to Parry means greater probability to proc Reprisals. When stacked on top of Dark Dance you have a very substantial chance of a Reprisal proc. The way the recast time for both line up you could stack a KF every other DD or hold it for moments where you need extra mitigation. This doesn’t remove the chance elements of the Reprisal mechanic, but gives the player better control of their best mitigation tool.
-Invigorate: TP regen we can use even while we are in Grit and Blood Weapon is unavailable. Not super needed, but just as relevant as the two other MRD abilities in my opinion.
-Other options would be Feint or you could always bring in Awareness, which some DRKS already do.