My guild ran into this guy today in PoS. Our puller pulled him thinking this was one of the BoT key mobs.
Hits for 1600. Slowable to some extent (shaman said she got a full slow of the first time and a partial slow off the second time). Rampages and Enrages.
With 23 people, average level 62, level 66 non elemental warrior tank, 4 clerics, no CH rotation, got him down to 50%
We went back and did it again and did a 4 second CH rotation and got him down to 0%. He should have died that time. That was stupid
Round 3. Dead
Just a little FYI. Good luck to all you SK's out there