Apart from Annihilation there is on more great spec for PvP. Every good Rage Marauder will know that when stacking surge and power you get a character that hits like a truck.
Fully geared with WH grade power+surge mods, enhancements, relics a Marauder/Juggernaut in rage spec can do 5500+ crits with the following rotation:
Force Charge--> Force Choke/Crush--> Shockwave x4--> Smash. This will leave many oponents a damaged wreck wich then you can finish with your other skills.
But it's not OP If you miss with smash it's over unles you can get in range before Shockwave cools down you are dead. Good playes who can predict this coming can escape but they have a split second to do it or they take the mostrous hit of the Marauder/Juggernaut