Inspired by the dual-wielding Pyromancer using exterminus, i establish this build with the 2H weapon–Harbinger of eternal suffering.:rolleyes:
Witchblade is a better choice, similar OA, 300 more DA, 500 more armor 30% more armor absorption.
This is the cal of my skills and devotion at lv76 with gears on. http://grimcalc.com/build/txjS85
This is the screenshot of my gear, btw the robe is Empowered Fanatic’s coat and the relic is conflagration.
The resistance is not good-looking coz 1) my reputation of outcast is Honored now and the seven armor are without augments. 
i will put 7*10% aether resistance in the future; 2) i may add 7-8 skill points aft leveling up to the passive of blood of dreeg such that i get 80 poison&acid resistance. Before hitting lv85, i will use 15% poison augments with my armor.
The damage mainly consists of fire and chaos and HP regen is amazingly 680+ with blood of dreeg only.
Devotions
Witchblade to reduce resistance, tree of life and behemoth to heal, obelisk pf menhir to get more DA and armor, turtle shell to protect me from deadly attack
Skills
