Got it.
Keeping all this in mind. Muzan apparently has passive stuff with his battle spirit as I've been told in DS debates;
He paralyzes Grave as soon as Grave is in his vicinity and Grave doesnt resist these hax.
Grave lacks the emotion to feel fear or anything related to it, only anger. That was the caveat of him becoming a deadman, him losing most of his memories and emotional capabilities. So would this still affect him? And him experiencing this bleeding doesn't mean much when he has the ability to regenerate. Either way, Grave normally fights at a distance, only really getting up close for certain demolition shots.
Muzan also has;
A simple scratch from muzan is ggs and it would be easy to accomplish this as muzan has ranged tendrils that attack an opponent all at once with his will, along with him jumping in to fight aswell. Muzan can also absorb Grave in the moment grave needs time to regenerate or with stealth, ultimately killing him. Imo this match should be a stomp as muzan harborbs passive battle spirit aura that paralysizes the opponent and slowly kills them from the inside, muzan has many ways to take advantage of that.
That would be a problem if Grave didn't have his own myriad abilities. One such case being his ability to "slow time" (only listed as perception manipulation but whatever). Basically, with any of his Demolition shots, he slows time down to a near halt, while he himself remains at his constant speed. This is also the case for his Day/Night/Dawn of the Grave DS, which keeps it as a constant effect.
(till 2:25)
(till 1:35)
These are examples of these Demolition Shots.
Stealth is also a very terrible decision against Grave. For example, back when he was alive and went by his real name Brandon Heat, he was a mentor to Bunji. Now, Bunji here was set up as a sniper, trying to take out a man who was somewhere a few blocks away. The problem here is that this guy was hidden, and being hidden at a distance means that it would be extra hard to spot whoever it is. Now Brandon here, the moment he walked into Bunji's camping spot, Grave just instantly knew where the guy is with no clue to help him. He just picked up the sniper rifle, aimed, and then fired, hitting the target dead on.
A question. Isnt muzan more skilled and experienced here?
More experienced as in he's much older? Yes, of course. More experiences as in he's faced a variety of enemies? No, not really, because Grave's seen it all. He's faced hitmen, Orgmen, superiors, other deadmen, and beings amplified by godly powers, each with their owned varied kit of abilities. And more skilled? Hell no, this is the trigun universe we're talking about. By Ginsama's own words, active supporter and researcher of Nightow's works, Grave's skills is on the level of Wolfwood and Livio's, even Vash's.