I leave that to you. If I am right about my power, I can do something with my sleepwalking.
Other than that, I don't really see a purpose for it. It would be kind of useful, if my target was not informed about the sleepwalking. But that is not the case.
We have to gamble. Is my assumption correct? Then I'd be able to kill royal with it.
So we could go for two kills this night. Which we desperately need. But royal alive could be a big problem for you. As soon as my role is revealed they know that Mazre is lying and you are suspicious again.
I'd take the risk an kill someone else. But I'll leave that decision to you. I'd go for one of the trackers. Enker or ferret are good targets. Freak is still a good target for town. So Keeping him alive may benefit us.
As for the remaining roles. I don't think we have many roles left who have not revealed yet.
Doubt we have a Doc or Cop in this game. Doc would be too powerful for this game and a cop would have claimed already.