The AP advantage shouldnt be much of a problem as he has fought others like rui who can one hit him casually but was still able to keep up a bit with his threads (which are inferior but comparable to his neck in dura) and in exchange defeat the guy with his Hino amp, albeit with nezuko's help.
nezuko regenerates but isn’t strong enough to kill kimiko, eventually the sun rises and nezuko dies So it's a vote for Kimiko?
Nezuko vs Ochako (Grace) Speed Equalized Location:World of Void Win via Incap or K.O Bloodlusted Nezuko is in her demon form Nezuko : 4 (SpookyShadow,ShadowWhoWalks,lonliosite,Milyrockingbandit) Ochako : 7 (InsertCreativenamehere12,Kingofwolves999,NomsNoms,TheFormosfacast,The Calaca,Sora and buff riku,Zoro21043 Kool-aid_pickle Thread
The reason Nezuko wasn’t healing right away was because she simply wasn’t strong enough, after that, she gains a power up and his regeneration speeds up dramatically. The same applies to the fodder demon that Muichiro fought. And the stamina stuff really is a whole other topic that should be addressed on a different thread.
Btw Nezuko didn’t even train to master her demon form, she just did out of no where. This is confirmed by Tanjiro when he told Nezuko to not transform because he thought she’ll go berserk (nothing happened). Tengen didn’t even manhandle Tanjiro. Why is the scaling so flopped.
A prime example of this comes in episode 202, when Nezuko is directly hit by Demon Lord Tanjiro's Shockwave Scream Attack, but holds up relatively well. Her hands were starting to bleed, but otherwise, she was fine.
Nezuko was injured and starving when she attacked Tanjirou. Tanjirou was in pursuit of a demon he would be moving at his top speed. Ah ok my bad on that one but I don't remember Tanjirou dodging the lightning itself.