Batman, block Wishmaster.
Dexter, kill Amka.
Potter, block Mentalist.
Jack, redirect Kosh to Wishmaster.
According to Arke, she is not Watson. She is either Batman or a Mafia member. In the first case, the redirection will not have an effect, but we will confirm this by looking at the night descriptions of the roles. In the second case, she will reveal herself and may kill her partner.