I was unable to beat this combo as rogue/pally, rogue/druid and rogue/shadow priest. I hear several forum vets saying it's an easy combo to rough up, but I have no clue as to how it's even remotely easy. It's always the same.
Rage isn't a "limiting" factor for warriors like they say it is. Even if you leave him alone, he's going to get more than enough rage from beating on you/your team mate to do enough hurt damage. You can't kill either one "quickly", you can't control either one reliably: how the hell do you beat this combo?