Okay so I died to the Bloody Hunter of Cainhurst at least 15 times smh. When I finally did beat him I actually only wasted 5 blood vials, which makes me think he may be more of a tricky opponent rather than a hard one. Okay so I had 9 bone marrow ash, and I was leveled up enough to use a cannon. The cannon really **** him up so I would suggest using it once. I had around 6 molotovs and a few throwing knives. What I did is lure him towards the staircase as the space is much smaller and its easier to dodge, as well as escape outside. I used the cannon + bone marrow ash immediately. After wards I kept baiting him down, waiting for him to switch to two-handed. When he’s fighting two-handed its much easier to be aggressive as he can’t parry you. I was using the one handed version of Ludwig’s Blade (I would suggest using a fast weapon that is either +6 or higher). Using a fast weapon is advisable because you can still manage to land attacks on the crow even when he’s using old hunter’s bone. Whenever he switched to one handed and pistol, I would keep my distance and throw either molotovs or knives at him. Mix it up with bullets +bone marrow ash. He relies on offence so try to keep to a defensive fighting style until you’re sure you wont get parried. DO NOT allow him to land more than one hit on you unless you have an insanely long health bar. Whenever he’s fighting two-handed two hits are enough to kill you. Also, the closer you are to him when his bullets hit you, the more damage you take. The further you are, the less damage done. Hope it helped a little!