I killed this guy with hardly any problems with all 3 classes a while ago. Helping my gf with this quest tonight he just will not die, about 5 tries so far. At one point there are about 6 or so lvl 26+ attacking him (a few including myself using arc weapons) and his shield never even dropped below 1/4 before he despawned.
Did he get a mysterious buff or wtf is going on?
[b]edit:[/b] finally got him after a few more tries, finished it on a public event that went much smoother than the previous one.
But still he seems to be much more of a pain in the ass than when I did it before
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He's much easier to kill if he spawns during a public event. If you get the random encounter version he's a complete tank. I had 3 other people firing arc damage at him and we only took him down because I managed to get a sword off a Sword Bearer that spawned.