Like riding a bicycle...
It's been a few years since I've replayed DS3, but Nameless King still ain't no thing. This is also the first pyro/dark build I've ever done, and hot damn, does it feel cracked.
I feel like Elden Ring weirdly made me better at previous Souls games. Something about spacing and racking up stance damage (well, you know, for what few bosses that applies to in DS3) just feels more ingrained, now. You can also kind of tell they used NK's general rhythm as a foundation for Radagon of the Golden Order's fight, haha.