that's some new stuff, i read the comics back in the 90s. If they turned him into some martial artist since then my point is moot. But going off classic spiderman and cap. He doesn't have any fighting styles that he learned from shang chi.
it exists now. so if he lost his powers, he would be able to lean on that as well
although the reality is neither one of them would be effective in combat without their buffs because their buffs are what make the skills work