This is a straight forward shot for you to obtain the three star mastery. However, you only have one shot to obtain high enough scores.
Aim between the gap of the upper planet and bottom left.
Power Activation Point
Activate your laser sword shortly after you pass the hanging pig. Your purpose is to both kill the pig and possibly damaging the tower a little bit.
First Shot Result
After you explode and trigger the bomb, the flying debris kills all the pigs and reward you with the mastery triple star.