You can get this one with some good, old-fashioned Raphael spam! Select easy difficult, choose Raphael, and simply hold
(or left if you somehow get turned around) and mash
. That's it! I did have a couple opponents try to put up a fight, but nothing that required any skill with Raphael. Each fight should take between 10 & 15 seconds, so there's not a ton of wiggle room. If one fight takes longer than a minute, I'd suggest starting over. My longest fight was 55 seconds and I finished in 5:43 overall, so again, not a lot of wiggle room.