WOW Quest:Battle Before The Citadel (13864)  

Tip: approaching from where you got your mount go to the right (or west seen from the map) side, pull some skeletons before you try to kill the commander. when you can pull the commander start with using shield-break on him while you run away along the wall, there will be "ramps" up the wall, climb them, then jump down and charge him when gets off the ramp and climb it again, and jump down and charge, repeat. Also use shield-break on any free time, and keep shields up.