50 Votes in Poll
Despite the MASSIVE downplay on the series, Muzan can beat Sasori quite easily.
Going to use the Hashira and others to scale Muzan.
For starters, Regular Demons have Instant Regeneration:
https://cdn.discordapp.com/attachments/871231816051355648/871499450588217414/0184-011.png
All the Hashira are instant if we compare them using the official speed rank.
Since Tengen is stated instant and Mitsuri upscales from being the slowest, it would make everyone instantaneous.
In any case the feats and statements are "random" and labeled as incompetent for the verse, numerous times it's been shown and stated. Stating multiple times can't be ignored, so atp it's just inevitable to accept (which I could show more feats).
Not the only Hashira feat we've seen just by using Tengens statement.
After Training Tanjiro stated Instant, which Hashira upscale a lot.
For this, you could argue that "Tough Situations" is just enemies like Demons that would scale below, midway, or above Hashira which would make sense since their Instant with or without the scaling.
Once again for the Hashira, Rengoku is stated instant: https://cdn.discordapp.com/attachments/1038251208785272952/1183075781841256539/0064-006.png_1.jpg?ex=65b528ae&is=65a2b3ae&hm=f7082256bb5e0d55f0be5614747f67d73dca1b5d52938da8b44547f24b9e7381&
Reacting to instantaneous strikes from Akaza:
Amps like DS Mark are used to increase strength and speed:
https://cdn.discordapp.com/attachments/839975985733697566/839993984050659379/image0.jpg
This would make Immeasurable speeds which is above instantaneous itself.
From the very first scan I showed was a heavily drugged Muzan designed to weaken him.
https://i.imgur.com/LrV5A4d.jpg
https://i.imgur.com/eisHxZe.jpg
Drugged Muzan
Speed + Attack Speed - Immeasurable(+) (Able to tag Hashira)
Reaction Time - Immeasurable(+) (Able to react to Hashira)
Regen - Immeasurable(+) (Immeasurable"+" attacks onto Muzan heal 'as fast as they cut him'. Shown in the very first scan I showed)
This isn't even Black Haired Muzan, but that's all I pretty much have to scale him towards for Narutoverse and Sasori to be fodderized and blitzed.