I run with a priest also. First, hopefully your priest knows how to pole hump.
On a rogue/priest, I'd kill the priest rather than try to get the rogue. You can try timing an intercept after the rogue kidney shots the priest and have your priest trinket and run away. Hamstring (maybe thunderclap and demo shout as well) the rogue and go back to the priest or kill the rogue if you think you can. Your priest must do their best to stay away from the rogue.
As a general rule, if the other team has a priest or shaman, then I'm going to try to kill them before they kill my priest.
I saw a video of a high-rated warrior priest team. I'll try to link it if I can find it.