I faced him once i and was a Light Side Jedi Watchman. Took him down pretty fast.
What I did after the doors closed shut was to cast Force Enlightenment which would activate Master Valor, Master Armor and Master Speed and charged in with 2 lightsabers. Use Master Flurry once in while but really not necessary since with 2 lightsabers and Master Speed, I would have 4 attacks on him at any one time. The occasional Force Wave would also knock him back and stun him.
Not very hard to kill. Besides Darth Sion, this is perhaps one of the more exciting opponents to fight in the entire game.