I use a very similar build but I tune less for healing and more for damage. I do find it can get hairy with a lot of incoming burst but generally it's been pretty solid. I don't use a primary rage generator at all, instead I rely on passive rage gen to leave me enough to WW. I use ground stomp instead so grab mobs, ground stomp, avalanche, WW until you have a decent rage bar then rend rend rend. I also use battle rage:into the fray instead of war shout.
Nice one man