There really is no "trick" per se. He just keeps healing himself so you gotta deal the damage as fast as possible. Using speed/dark rage and running right into his face and madly clicking works wonders. With a staff, Kyle drops pretty darn quick, especially if you use the cheap crouch attack, same goes for dual sabers. Every time you lay off the attacks, he'll heal and cast protection on himself, and since he has 200 force, you can't really stop him. Offensive force powers like choke and lightning do not work against him since he's got absorb, and why would you really want to give him more force while depleting yours? BTW, I have a feeling Kurgan or one of the other admins will move this to the strategy shack.
"Size matters not."-Yoda
"There is no emotion; there is peace. There is no ignorance; there is knowledge. There is no passion; there is serenity. There is no death; there is the Force"-the Jedi Code