Dante stops time and shoots him gg.
If we're gonna put in calcs here, then Raoh's speed advantage + Musou Tensei hax will result in him winning this.
But since I'm not gonna argue for any of the speed numbers from the recent HnK calcs except for the high-end mach 12+, Dante still wins this since he's faster in executing his hax.
Not sure what shooting is going to do to Ken-Oh. Seeing how Kenshiro, his younger brother was able to take a skyscrapper, giant rocks, and steel beams struck over his head. This was before Kenshiro was strong enough to take on Raoh.
Also here is something that Dante is going to have to watch out for....here is a younger Raoh, showing how deadly his punches are. Check at 7:20