With morals off that's gonna be an hard fight for both of them. Black Adam is a killer but if Diana decides to kill something she does. Black Adam is stronger than her but she has the speed advantage. Both are skilled fighters with a lot of experience.
I think we are all overestimating Black Adam. Every Time i've see him fight was against Captain Marvel or Superman. CM is powerful but less experienced than BA. Superman is powerful as him but he's weak against magic beigns. Wonder Woman is stronger as Superman and CM and it's resistant againt magic. I can't remember Adam fighting someone with much experience as him.