A good way to single pull Kallis is to dispell one of the "a Protector of Zek"s standing next to him (you can do this with crystallized pumice, which can be bought from a merchat). Run back towards the temple building and feign. Either the PoZ you dispelled or the other PoZ will stop to rebuff the debuffed PoZ. At this point, he is quite far away from Kallis and the other PoZ and can be easily tagged. Do the same with the other PoZ and then lastly pull Kallis.
Pulled this guy last week. We had a monk and a shadow knight piss off the protectors and give them the runaround while I picked off Kallis and we killed him, then brought the other 2 back one by one. Went real smooth and took less than 10 minutes (including perp time and pulling).
Killed this guy a few days ago. Tough pull back behind the arena with 2 clerics nearby in agro range. Was fairly easy to take down though if you can keep the clerics away so they don't CH him.
Had a Black Blade of Torment (visible) looks like a black two handed sword but is one handed.
9d 22dly 10.0wt Effect: Torment WAR RNG SHD BRD ROG primary or offhand usable
Not sure about the proc, but it seems to be a Blind and DoT
NE and friends took him down on Innoruuk, in a two group pickup raid. Trick was to clear the sourrounding area fast to give a window in which to pull kelis, then we used COH to separate him out from the clerics. Paly pulled to a pre-determined spot, using DA, Mage times coh to hit just after DA drops, ranger pulls with arrows once the two clerics have wondered back out of aggro range. Monk FD pull doesnt seem to be realy reliable with this pull for some reason.
Group Makeup was Group 1: 58chanter, 56 cleric 56 mage 59 ranger 55 paly, 55 druid, Group 2: 53cleric, 54 shaman, 58 necro, 53 war, 53 wis, and i forget the last, i think it was a melee class but i cant remember who.
I've successfully seen this guy pulled twice. Both times by a monk. It took a while to get him single, but the monks did it. Sometimes the monks would dual single-pull. Both monks were about 52nd level too.