The key to obtaining a triple mastery star is to obtain high enough scores. You will need to trigger all the TNT bombs in the stage.
Your first shot will kill the upper right pig inside the metal blocks.
Power Activation Point
Activate your jedi laser sword to kill the pig inside the metal blocks.
First Shot Result
The pig inside the upper right metal house dies, now you are ready to launch your final shot.
Launch the second shot from the bottom planet. Now this shot will take care of the bombs that cause chain reactions.
Second Power Activation Point
Activate your jedi telekinesis power when you bump into the wooden blocks.
Second Shot Result
One bomb sets off another and all the pigs will die. You then walk away with the three star mastery rating.