Very easy strategy to defeat him.
Whip some concussion grenades at him (primary fire) while circle strafting him. He wont be able to hit you. One the sheilds go down, hit Force Speed and equip the Imperial Repeater. Run right behind him, knock out the attena. When he goes down, and semi-blows up; back off and let your force recharge.
Equip your lightsaber and get close to him again, Force Speed and get behind him again and slash like a mad man with your lightsaber. It'll take 2 or 3 passes with the LightSaber/Force Speed combo but you'll barely get hit. And if you do, just run for a bit, use some bactas and/or use Force Heal which should be on Lvl. 3 by now.