Lesson 1 - stay in def stance all the time
The group pull
1) blow bloodrage
2) charge one of the rearmost mobs
4) (do you have shockwave yet?) move your toon so that all the mobs line up and shockwave.
5) shield slam the Kill target
Cleave + devaste the kill target
tab to another target - Cleave
Tab to another target - cleave
shield slam the kill target
Popping retaliation before a charge is a fun option but you cant do that too often.