Im around 1250 pure caster(nec) lvl 65 with like shielding 2 he hit me max for 709 a few times..play on progression server(vulak) ..am able to solo him easy with heal over time pot and 143 aa with 6.7k mana and self buffed to 6k hp
Stand against the back of the wall in the corner of the building he resides in, you won't get any aggro (I even had my 61 druid loot something from him his corpse and didn't get any aggro from the mobs, aggro range in hate is very small). Bust out your pet and do pet hold. Load up your dots and disease nukes. Hit him with festering darkness. He'll usually stand there and cast on you. Nail him with your disease nukes first, then cast all of your strong dots on him. When he gets up to you then let the pet on him, try to turn him around so his back is to the wall, otherwise your pet might push him into the aggro range of another mob. Hit him again with the nukes and dots. Lifetap him a few times and he's toast.