HELP! SA pathfinder at a loss.

So I've been following mathils video guide on his take of the scourge arrow pathfinder. Something seems to be going over my head looking at his PoB numbers compared to that of my own. Was hoping I could turn to someone with a bit more experience with the game and build. Still pretty new to the game so I'm surem I've overlooked something blatantly obvious to you guys.

This is my build here. https://pastebin.com/yLnDK5Yh
Compared to mathils here. https://pastebin.com/PgZfvBDZ

Here are some factors that makes your damage less than his:

1) He has Lioneye's Fall on some dagger nodes that contributes to 8% of his total damage. Also his other jewels are pretty solid damage boosters. Old tree I suppose..

2) Flasks actually boosts your damage by ALOT, and he has them activated in PoB, and you don't have them at all (this is your biggest boost)

3) He has added chaos/phys on his rings. (Also phys + chaos on amulet, while you only have phys)

4) Hit chance (93% on you vs 100% on him, Precision aura?)

5) He runs high level Malevolence.

6) He runs Vaal Haste which is activated in his PoB.

7) Not sure what happens with your Wither setup but it's increasing his damage by like 40% but can't seem to get yours to pick up the same damage... Oh well.

Hope this helps :)