Which skin should i buy for shen ?

Warlord and bloodmoon are both super cool imo

It depends, Blood Moon is cool if you like the demonic look. Warlord is more ancient Japan themed if you are into that sort of era. Surgeon in my opinion is just too overused. If I had my choice I would go with Yellow Jacket or Frozen just because I enjoy the Mortal Kombat reference.

I love warlord shen.

I really like blood moon myself, surgeon is a little bland imo, warlord is pretty cool too but if you could get your hands on yellow jacket or frozen those are kind of the funnest thematically to play