I was recently told that Blind Fight doesn't work at all. Not for melees or ranged. I was under the impression that it only worked for melees and not ranged but I was told otherwise. I really like the re-roll becuase of concealment feat so please someone verify this.
It definitely works, I did quite a bit of testing with epic dodge and self concealment and blind fight to check out how good they were. Blind fight definitely works for melee.
Blind fight only works for ranged if you are close enough for blind fight to work. If you are too far away then blind fight doesnt work.
My first tests with ranged blind fight showed that it didnt work, simply because I was too far away for it to take effect.