I wanna add one more comment before I leave this to simmer. An argument I'm seeing is that Denji will just tank miles attacks and keep gunning for him in order to utilize his superior stamina and AP in order to net himself the win. This is very much not the case as simply having a higher AP doesn't just make you immune to knockback and stunning attacks, which Denji has shown to be very susceptible too given his carefree fighting style. Even if he does get close and managed to get a few hits in Miles has Venom Strikes which can send physically superior opponents
flying dozens of meters away with a touch and invisibility as mentioned before which a merely enhanced sense of smell really isn't getting around. Even without that Miles would very easily be able to escape to a distance in order to utilize his ranged advantage considered he
1v1000'd the entire spider society during his escape in the second movie. Once he achieves a range advantage all he has to do is spam webs until any part of Denji's body that's not covered in chainsaws is bound, which is a pretty large portion of his body. Yeah he can cut through them with his chainsaws, but that doesn't matter when they're glued to his body unable to be utilized. Miles simply needs to keep up the pressure until that happens and then Denji is powerless to utilize any of his game winning advantages. From there Miles would just knock him out once he realizes he cant reason with him and win via KO. That's my two sense.