I don't feel like they'd actually take out parry but instead buff it somehow.

But for the question I think one thing they could do is make reprisal dark artsable, as in make it so that reprisal is only able to be used under the influence of dark arts; that is if they still chose to even lock it behind something else. But in this situation they would need to increase the time it's on cooldown plus scrap its connection to dark dance or else you essentially give your dark knight a virus.