LOL, gathered 2 SoJ over walkthrough and boss spawned. Fight took over 2 hours. Boss has insane regen and maybe some leach, plus you cannot mana leach from him.... So i to town and back trying out different equipment to see which works best. My leveling gear could not even move his hp bar. Went to other acts to gather gold, essences, crafted some stuff, restated 2 times.