If you try to do the labirynth and you have problem with lady-snake-but-werewolf-wanna-be, then you can just cheat her fights by saving before atempting to flee. If you have decent lvl going in, it should let you win easy.
( If they patched and now you can't flee from those battles then welp. You gotta go grind some lvls boyo)
For that I propose self-made trips with tons of mimics and some proper Demon (s)Layer.