Apart from already mentioned, this is a fun build too and also quite easy to play. It uses shadow strike to strike heavy and move fast [1.2.1.4] The cold assassin - HC Beginner Cold SS Trickster - From the scratch to easy endgame farming!
The new berserker class could make for a fun Onslaught + cold/frostburn Ring of Steel build. Charge up onslaught stacks and them boom a Ring of Steel. Something like this Reaver, Level 100 (GD 1.3.0.0) - Grim Dawn Build Calculator