Well, sorry @Archmagos Issac and @Astrowitch the fight finished before you got to help. Bright side, that was the original plan, and there will be plenty more enemies to kill. Feel free to introduce yourselves.
Well technically the objectives are a bit nebulous as to how much effort they take to complete. However you should hope yours isn't because the reward is a Wrath Point, of which you are full since you just got into the game.