on my first pass, couldn't get past Father G and gave up even with the music box. I couldn't get the hang of using the pistol to stun then go in with the axe/sword, etc.
Use the gravestones to keep a physical buffer between you and him. This allows you to cheese him through the gravestones with long reach attacks, e.g. with Hunter Axe's spin-2-win. Towards the latter part of the fight you're still going to need to do some real dodging, but this cuts the danger time down to something more manageable. Didn't need to use the music box or any parrying, it's all about that dodge/roll.