This stage doesn’t really much have any timing. Your best bet is to launch the pig and rocket a few times until it kills them all. It’s possible to get the three star mastery with two shots in this stage. However, it’s much easier to keep on trying and obtain it with one shot.
Just launch your rocket pig, avoid the incoming lasers.
Power Activation Point
Shoot out your rocket somewhere in mid air, note that you should still avoid the incoming laser so that your pig can do more damage when it lands.
First Shot Result
The floating platforms should at least kill the pigs on the left structure. If possible, you can potentially kill all the birds with this shot. However, if you have some left over in the right side bone structure. You can pick them up with your next launch.
If you do have any stray birds that are still alive. Launch your pig at the building leg of the structure.
Second Power Activation Point
Activate your dual jedi sword and kill the bird inside.
Second Shot Result
The bone structure falls and kill all the birds. With all the birds dead with two shots, you end up with the cool three star master for the stage.