This event goes as described in Wiki and I've completed it about 20 times.
from Wiki
4 skeletons will immediately spawn. After they are dead, Miragul (erudite) spawns inside the hut. During the fight, he will basically completely blind anyone within 50 yards until the end of the fight. When he gets to about 80%, 4 skeletons will spawn. Kill the shortest one. Keep killing Miragul until Sir Lucan D'Lere spawns, and kill him. at 10%, Miragul will aoe knockback everyone and put a 100% movement reduction on them, so it is recommended that you have him near the wall or the tank will be unable to reacquire him.
However this morning Sir Lucan got to 70, then regenerated to 75 and then hovered there. Then event despawned. Now it has been over a year since I last did this event but this was new to me. Certain I had sufficient dps. I'll try it again but wondering if this could be a new code glich?