This boss is not a difficult foe to deal with. He makes use of typical attacks such as Axe, Swing and Takedown. Plus, you have Matoya on your side. Also, a Base Captain and a Storm Trooper will be fighting with him.
First things first, get rid of the Base Captain and Storm Trooper. You only need one healer for this fight, and Matoya will do that just fine. Attack him with everything you have and let Matoya do the healing. However, keep in mind that he can counter attacks with Takedown. This fight is a no-brainer, so you can win it with ease.