build help - bleed retch cyclone slayer

my 2nd build theorycrafting so would like some input on what you guys think. high leech + 75% phys ref immune (with reflect pantheon). going to go with the retch and atziri disfavour. I thought about going BM but in the end i realized i preferred being able to go blasphemy + vengeance. lmk what you guys think on tree and gems as well and what i could do to improve the build. thanks for taking the time!

pob link:
https://pastebin.com/RZD3NzLh

skill tree link for those without pob:
http://poeurl.com/bvv6