Suggested by iKnowledge Rey is a skilled fighter as we clearly saw in the Star Wars trilogy. That said, I don’t believe she would be able to take on Zannah. Zannah had more proper training and really became an expert fighter. While Rey should have some resistance to her mental assaults, it will be a decent distraction during the fight. Ultimately Rey can surpass Zannah if she continues to improve but at her current level this is not a fight that she can hope to win. Darth Zannah wins.