Juzou the Drunkard is a brutal fight! I rushed Hirata Estate my first playthrough and got stuck there for a long time.
IMO spirit emblems are cool but ultimately a waste of time–they’re a lot of fun to play with in the open areas, but for a bossmost bosses, it’s faster to just learn the fight than spend time farming tokens to try to grind it out with prosthetics.
You may know this already, but a slightly hidden mechanic is that the parry window is a while .5 seconds if you hold the parry button down–if you just tap it you only get a couple frames, but if you hold it, you will find the window far more forgiving.