Really enjoyed the videos thanks.
I actually got 4 DH's up and running with full M6, it didn't take too long and I'm surprised at how much fun I am having with their playstyle.
The only thing though is my DPS even with full M6 is no where near what you are putting out.
I'll have to compare your gear to mine and find out what the difference is, it looks like Calamity helps quite a bit but I'm sure there is more to it.