Killed him today with lvl 85 Shaman, Tier 5 Warrior Merc, and pet. I pre-buffed the Merc with Wild Growth, Lassitude, and Halcyon Whisper just before pulling this Fabled. I pulled with Malosinete, cast Turgur's (did not notice if it was slowable or not), then Healed the Merc, cast Spirit of lynx, Epic click, DoTs, etc. It was not a difficult fight. Fabled hits hard so keep the Merc healed. Pet got snuffed at the very end of the fight, but Fabled Magma Overlord bit the dirt shortly afterwards. Dropped Fabled Flame Gilded Cloak for Ranger Alt. I got him to spawn by killing every "Greater" yard trash mob I saw. I also killed all the Doomfire Watchers, Wizards, etc. in the two gazebo type things and the Fiery Equine Spirt Lords. Wound up killing most everything in the field between C1 and C2 before the Fabled spawned.