First of all, Into the Fray, Booming Voice, Bolster, and Anger Management are all mandatory talents for prot warrior. The extra haste from into the fray will help overall significantly. The reduced cd on last stand helps fill in for when we don’t have shield block up. Booming voice is great for rage generation and more damage. Anger management lets us make more use out of Unstoppable force.
For single target rotation it’s shield slam-tclap-revenge(free)-devastate. Also, remember shield block increases shield slams damage.
For 2 or more targets tclap-revenge(if free)-shield slam- devastate.
Never use revenge unless it’s free, and if you are getting low on rage shield slam or demoralizing shout.
If you’re ever about to overcap on rage put it into ignore pain.
You’re feeling of a lack of rotation if probably also due to you using devastator. Prot feels like it has more than enough to do imo. If I’m incorrect on anything please let me know fellow warriors.