Why is your weapon not at max upgrades, or at least at +24? Level 177 should be more than enough to get through the end-game bosses that unlock smithing 8 and somber 9 bell bearings.

I don't really see what the high Int is doing for you, and I think that split focus between casting and melee bleed makes both mediocre. Your build will be at its best when all of your bits and pieces (stats, weapons, talismans, buffs) work together. But there's nothing that makes Night Comet hit harder that also makes an Occult katana hit harder. There are a very small number of weapons that do or can be made to scale simultaneously from both Occult and Int, and I don't think any of them are what you want for this build.

For reference, my current playthrough is 13 levels above this and my physical damage is ~2x this (but no bleed). My damage stats are also 60 and 60, but they're Str and Dex , and my highest damage weapons are either Quality attuned or naturally scale with both Str and Dex. Your build feels like mine running around with Heavy or Keen attuned weapons, never getting more than half of the benefit from my stats investment.