You may use BadRotations AddOn with UCS. You will need to purchase "BR Patcher" module following these steps on the home page WoW:SL -> Utility Scripts -> UCS -> BadRotations Activator.
To get started, you need to follow the general steps:
1. Visit the github of BR and download the latest AddOn.
2. Extract the archive to WoW AddOns folder, with “-master” removed.
3. Rename BadRotations folder to any other name and BadRotations.toc file to the same name accordingly
4. Follow UCS installation manual
5. Disable all other modules in UCS (Including HF and KFM rotations).
6. Make sure the rotation is subscribed and loaded and then get into the game.
For more details about BR and to report bugs please
join their Discord