It's clearly JJK, but I find the style of Gege quite unclear to follow in battles, kinda like Araki's Vento Aureo and Stone Ocean.
To this day I still have not clear what a domain actually does as I am too stupid to actually understand properly.
I may be biased, but going back to the big three, I still believe Bleach had the best powerups and fights, as it had a style that Naruto and One Piece couldn't keep up with.
Naruto had worse powers and fights that bleach but at least had a plot, and both have better fights than One Piece.
But then you look at DBZ, and none of the above have the same choreography and punch, dragon ball fights are more visceral and hit quite personal. I have read some mangas but not many, but to this day I would still put the best "fights" with Dragonball.
Something like, generally fights including powers, powerups etc:
10 / 10: DBZ
8: Bleach
7: Naruto
5: One Piece (Too little focus on fights, Oda clearly is here to write everything else but fights, as the last chapters are a perfect example of, fights used to expose plot).
JJK would be a 6, I think.