Sure he isn't Force user, but he does have his advantages 1. Super computer chip in his brain, which would help him to control 4 lightsabers(Even some Jedi with 4 arms could not do so), calculate the enemy's move and reply with reasonable counterattacks. 2. A very strong and agile mechanical skeleton body. 3. 4 arms and legs as weapons. And in CW he knew how to use his advantages, strike in right time.