With the arena's dramatic dark water issue cropping up, how persuadable are the newly risen dead to being told they're dead by a person using necromantic means of, well, persuasion?

As in Wei Wuxian commanding any of them (with empathy in his heart) to retreat, because having those who die in the chaos kill more to add to the ranks is nothing he'd sit back on if he can help in more than a one on one sense. (Since if he can't, he'll just do the same one on one.)