His max hits is 414, average at around 220. Mitigates slow, summons and procs Rotting Flesh.
The locals in room and in the tunnel outside his room respawns quite fast, so you have to clear the tunnel and the room needed to pull the Spiritseeker fast, to avoid add's while your fighting him. 6-8 static's in the room, 3-4 outside and a occasional roamer.
Serverfirst attempt was shm 62, shm63, ranger 64 which failed in 10 secs or so. Turned to shaman after malo and slow and took him down within a few secs. It takes a tank, slower (although its partly successfull) and a healer. Most important is crowdcontrol or speed, though - because of the low respawntime on locals....
When SHM (me), CLR, WAR, BAR, CLR and MAG (all over 62) took him down he dropped the Int-cloak Wolvyrine mentioned (ac9, dex5, int4, hp25, mana100, sv fire/magic +8) Would have liked to see the ring... ah well.
We had this guy show up on track last night. He conned Yellow to a 58 SK and 58 Cleric, Dark Blue to a 65 Shaman . Anyways there were about 8-10 guards in the room with him that have a fairly quick respawn rate, we finally pulled him and he took out the other Sk and the Shammy first then jumped on me. I had over 1100 ac at the moment and he was hitting me for well over 300 points of dmg , not to mention he had some kind of Dmg shield or proc when he hits you. Every time he hit me melee i took an extra 100pts of dmg, i got a messg saying....Your Flesh Begins to Rot you take 100 pts of dmg....and he does cast..hope to get him soon for some revenge.
Dark blue to a 65. Must be 60, not 55 as stated above. Hits 414, unslowable by an enchanter, didn't have a shaman, so don't know about the disease based slows.
In a room with a bunch of other guys, with a level 65 pulling we didnt have many problems with pulling more than one, besides the ones that were at the 'doors', couldnt pacify them with a 62 cleric, got a message 'Your spell was slightly successful' with a level 60 shaman slowing(i'd say it was a bit less then successful ;) still seem like it was hitting at full speed), couldnt be snared or rooted, hope this helps =)