Without seeing some of our other talents this is pretty much what you'll be doing to maximize rage and damage output. You'll be standing in fire to try and generate as much rage as possible when it's not detrimental. You'll be using shield block even when you're not tanking for SS 30% damage buffs and trying to keep it's uptime longer. When tanking you'll have Sblock up more than you do now so you'll be pouring as much rage into either Ignore Pain depending on how it's triggered and heroic strikes. Occassionally holding out on Ignore Pain casts for specific timing reasons like big boss casts.
I mean have some imagination. Your character is just grunting and grinding his teeth as he just shakes it off and shouting at himself to "Take it like a man/woman in child birth."