Here's how I beat the final sparring match every time:
Create a separate save file for the fight and save often.
-If something good happens and you lose, it's a bitch to do that good thing again
-Also you can try once
Use the Mandalorian Melee shield to buy time, it won't be much but it's enough for a medpac or two.
Use the force. Whirlwind and force lightning are very good in knocking handmaidens off the mat.
Move around. Chances are a maiden will walk off the mat.
Pause often and strategize. There's nothing wrong with planning out your moves in accordance with the current situation.
hope this helps.
