Been camping him for 5 days with my bard and wife's ranger. Never seen him. Not once. Killing everything the the zone doesn't help either. Since alot ...
Soloed static spawn version of this with 75 Necro, 880 AA....easily.
Cast Duration lifetap until it landed, then tap tanked him down. Resisted every lifetap from him.
I'm Anguish/DoDh/DoN geared.