GoD kills large group of white and elites very fast.
At the entrance of a rift, spawn few HA (or other primary skill) to build up the stack.
Then press and hold the Strafe button. Click HA every one to four seconds to keep the stack up. I rebind HA to Space bar for convenience.
Just to note that if no mobs around, Strafe won’t fire primary skill, and your hatred will go down very quickly. A high density map won’t be a problem because primary skill spawned by strafe will generate hatred. Beware low density maps. Skip low density area, and try to find large mob groups.