Cleric Beast:
I haven't went up against him yet with the axe, but my first attempts were with the threaded cane. I would just dance around his attacks, get behind him and toss a few R1s then bail. The cane did very little damage to him so I'd end up making some dumb mistakes and running out of blood vials and dying when he was a little under half HP.
The next few times I went in, I would go behind the boss and do a charged R2 attack, which helped take down his health faster. At one point, I did a charged R2 attack and the boss seemed stunned, so I approached his face and did an R1 for a critical stab. I was wondering how to replicate that as I can't seem to do so...anyone know how? Is it a matter of timing? Also I've tried using the pistol to stun the boss mid-attack but I'm pretty sure that doesn't work with him
