So basically what you are going to do is run outside to the launch pad and get on your mount. Then you kind of hover over the best spot that is a straight shot to this npc. Put on your crusader aura and make a b-line for the npc. Right before you get over the entrance to the room with him in it, you need to bubble. When you are standing in from of him, hit an auto attack like diving storm and crusader strike and he should be dead.
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