Personally, I take Incite and the last point of Shield Spec over Blood and Thunder or Heavy Repercussions, but you'd be fine. As for your gear, there's some really funky gemming going on, but nothing that's gonna keep you from being able to tank.
My typical AoE threat on a pack of mobs ability usage goes as follows:
Battle Shout>Charge>Thunderclap/Cleave>Shockwave>Shield Slam/Cleave>Revenge>Thunderclap/Cleave>Sunder, etc. I tab through my targets, always remembering that Shield Slam is better than Revenge is better than Devastate for single target threat. Always use Heroic Strike/Cleave if you have enough rage. Remember, it's not on the global cooldown, so you can use it at any time while using other abilities.
Kathy, I said, "I'm lost" though I knew she was sleeping
I'm empty and aching and I don't know why
Counting the cars on the New Jersey Turnpike
They've all gone to look for America