Faux Follets
Oh my god! Petrushka? Must be talented, I bow my hat to you Demonstration of expertise in a variety of skills is what's looked for, so you can't go wrong with anything Liszt--as long as it's not the same in technique and musicality as your other already-decided pieces. But you need something more 20th century and atonal than Petrushka. May I suggest something Scriabin? His etudes are wonderful, specifically the later ones. you can't go wrong with debussy etudes as well; it's a two in one package, display your impressionistic skills with virtuosity.