(Not updated for 1.3.0) Chaos Inoculation, Ghost Reaver.
A defensive build with Arc and Storm Call as the main damage source. It allows for easy aiming and players can farm and grind in relative safety, even with slow computers. The downside is that it's slow against large groups of monsters and is very mana intensive.
(Not updated for 1.3.0) Resolute Technique, Unwavering Stance.
This is a build which requires the Wings of Entropy and will try to get the right balance between offence and defence. Damage can be quite huge, but focus on defence as a priority and try to get high block chance. I have not fully tested it but even with a crappy skill tree it worked very well.