We did a bunch of these last night, 18 level 60's. We even did 2 at once with minimal casualties. By about the 10th one, we had them figured out. They can't be slowed, but some DOT's will land. First poster is correct, melee's up to 600, I even got hit with a double 600 once. Drops are usually nothing, but 2 of them did drop a pair of Luclin spells. The zone to The Ss temple is behind a fake wall in the "Grotto" where there were 5 or 6 of these.
Did him with a group of level 60's.. Cleric, chanter, Wizard, Rogue, Paladin, and Shaman...Can't slow him.. hitting max of 600.. doesn't hit fast...Has very high AC...We got him down in 8-10minutes...Didn't drop anything for us.. UGH