Pass Routes for fastest Receiver

I’m a retired coach but I’m a consultant so to speak for a fried who is the HC at a small 1A school in Mississippi. What he is wanting to do is naturally utilize his best players . He runs a trips formation with a back in backfire next to QB who is in the gun. He has his fastest best receiver to the single side. So, what I’m asking what would be the best routes for this receiver. Thanks in advance for responses.