One of my players is running a Tiefling Luchador (homebrew Rogue subclass) and his personal adventure will be facing his brother, whom he killed in his backstory and has since become a Chain Devil, in the ring. In the interest of making things more interesting than a toe-to-toe slugfest and playing to his love of pro wrestling, I'm trying to come up with ways to base the combat not on HP damage but instead on pleasing the crowd. I could make it a skill challenge and base DCs on the player's descriptions, but I'm hoping to include some more elements to shake things up. Any ideas?