Suggested by Sonic Shirou is a really powerful fighter. He may have started out on the weak side but over the years and different paths he kept on upgrading his abilities. The Level 4 Akuma is very powerful on his end as well but doesn’t have the speed to keep up with Shirou or to block the endless wave of attacks. Those weapons will eventually stab through the Akuma and then that’s game over. Shirou wins.