Yeah, that was a tough fight to learn. I’d say try to get through the dragon phase consistently, then once you can do that, really focus on the Nameless King’s moves. He only has a few and they all have an appropriate call/response pacing.

ALSO, Dark Souls 3 is secretly a rhythm game. Put on some headphones and turn up the music. You’re dancing with the bosses just as much as you’re fighting them.

Just gotta master that parry timing. Oh, and just wail on him and his clone when he summons it. With enough damage it won’t be a problem at all.