So I'm on my 4th-ish playthrough of the game after putting it down for almost a year, it's come to this point again. I at least waited until I had my Reaper of Cainhurst moniker locked down: Cainhurst helmet, gauntlets, and greaves with the charred Hunter garb, paired with the chikage +3. I completely forgot about his use of a repairing pistol, because that's just about the only reason he's killed me so far. I'm pretty quick at jumping in and out to get a few hits, and the health drop from his chikage always helps, but I've been not-so-gently reminded that he's still a major pain in the ass, but a fun one at that. If any of you have some tips to help, that'd be great, just thought I'd make a post now that I'm back on the wiki.
Bloodborne Wiki