Another way, (depending on your Jedi class and prestige class), would be to use master speed and energy shield to cut down damage. Use two single lightsabers with a nextor crystal and a sigil crystal for each, and use master power strike or master flurry. You can get Kreia to create other items to enhance your lightsaber. Or enhance your melee weapons and use hit and run tactics, and keep on healing after every round.