This is the Vengeance Slayer I've been playing for the last couple of weeks. It's my second time playing Vengeance, this time inspired by the buffs to Atziri's Disfavour.

As I explain in the video, the footage shows the build in a suboptimal state: I should have used Anomalous MPD and Anomalous CoC (as Woolfio did in his video a few days ago). Here's the PoB with the corrected support gem choices:

https://pobb.in/LHmx_wHwbwAj

The character now has significantly more AoE and about 10% more damage than shown in the video.