Build:Dark Phoenix

Full Build Details
Must have is the Lockwell's Revelation and Fire Affinity passives. Eventually you will trade the Wide Black Hat for an Antique Plate Sallet with the Aegis enchantment. Put the Economy enchantment on the Antique Plate Boots.

With everything set up correctly, and only 2 point into Mana, you can put out +185% total fire damage on a single enemy.

Sorobor Academy is suggested for the unique passives.

Full List of Passives:

Armor Training, Fast Maintenance, Fitness, Fire Affinity, Slow Metabolism, Efficiency, Lockwell's Revelation, Logistics Expert, Peacemaker Elixer