For gameplay, skip to the last 2 minutes of the video.
This video shows the standard frozen orb build with a twist when playing with a witch doctor using legacy items to make the zero dogs build work, spawning a lot of health globes to trigger the power hungry passive. This allows frozen orbs can be spammed almost indefinitely.
Later, I also got reaper's wraps which make this even more powerful.
If you have any questions about the build - Feel free to ask! If there are enough requests, I can create new guides for whatever is needed.