Blade furry build but what other gem?

Sorry for not having an overview of this forum but i found this YT guide for an amazing BF build that really fits my playstyle... but im not really sure what GEM and support gem his is doing , can someone help me because i really wanna start up this char and build.

Thanks :)

https://www.youtube.com/watch?v=0chvpXNPEbM