I remember when I did it, I had awesome guild mates who helped me out, including a tank with pavise who has kdr of 80k/100 or so that sacrificed a death to lure for the party, our master queenotshade, and another rogue who needs valkin too. The tactic is I and the rogue stays from a range firing at him, while queen (I think because with high dex he didnt die) and tank keeps him busy. We killed him under 4 mins.
Btw I think you should check out a small guide here, too!
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