Dropped him earlier tonight near the zone to Twilight Sea. Went down surprisingly easy. Didn't strike me as nearly as tough as level 44 would dictate. Maybe he spawns in weaker forms as well.
This guy is pretty tough. Me (47th Druid) and a 51st Cleric had trouble putting this guy down. He is very magic resistant and gets you with poison and that silly sun revenant's disease. We eventually had another wizard help us slay him for good. Just dropped the Ralcolms writ.