I think this is what I remember doing as a jedi Master with crappy lightsaber handling. Walk right in front of the door and place 15 mines without triggering the battle with the beast. Get him to run into them and them finish him off with your lightsaber
If you cant finish him off, then just hit him a couple of times then run and heal yourself. Keep repeating this until you kill him.
Advice: I know everybody has their own preferences so dont flame me, but next time play as a weapon Master