Jedi Temple (DLC) - Assault on Coruscant - Boss: Dark Apprentice
Stage 2 starts, you’re on a more breakable platform. He will float off platform and throw giant rocks at you. If they hit you, they hurt. If they hit the platform, it breaks a piece off. After he throws four, he’ll teleport down beside you and use Repulse to try and push you off.
The only way to “win” this stage is to Grip the rock he’s going to throw next, and throw it at him first. He will eventually break most of the platform, however, and you’ll be sent to the next stage.
This is exactly the same as Stage 1, only he is more aggressive. This video is from our unofficial game guide. You can view the full guide here