I think Kevin should do a routine that accentuates his strengths while minimizing his weaknesses. When standing next to Phil he should focus on showing off his strengths, like elite conditioning.
He needs to administer physiological warfare on Heath, by do something unusual like taking Phil and his father out to breakfast the day before the show or hide Phil's custom made shoes. Get in his head a little bit.
As far as trunks less is more, glitter in abundance and sequins placed in strategic areas will benefit him tremendously.
Feel free to share your ideas and suggestions!!