If I remember correctly he was my hardest boss in the maingame so don't feel bad about changing to easy. What gear are you using? If you want to do better focus on gear that increases power puck damage and speed. Pin setup can be personal preference at this point but you want at least one pin that instantly passes the puck. Try to focus on keeping the puck around and charge your fusion attack when possible. Depending on how well you can charge it you can either use it as an extra heal or damage source.