Nyx is too overpowered. I've tried everything I could think of to defeat her, I've looked in the comments for advice, I've switched between covenants for even the slightest advantage. Literally nothing has worked for me. I also tried to grind for XP, but my Levels have stopped at 25, and I'm not getting any more XP from fights in the prison.
I was enjoying the series up until this point. But this makes me not want to play it anymore.
EDIT: Nyx was the last of the chapter?! And she's optional?! Can I come back and kick her ass later, when CK5 is released?