My hubby and I have run into this guy a couple of times and I have to say, he/she is a legend.
We only killed it once in Rathe a while ago with a SK, Pal and Druid all in the 70's. We ran into him again two nights ago in City of Mist and we had the same chars and we didn't make a dent. We're guessing he/she is a SK.
Whoever it is, they really are quite witty and fun. I look forward to meeting them all the time, even if I die, it was worth the battle of wits.