The more that you let the aerodynamics slow the car, the less energy is required to be put into the brakes. But if you wait till very late to brake, the brakes will be very hot at the end and unless you keep some speed up after the run, you risk warping rotors since the disks don't cool down properly. I did some testing for a lawsuit against "Kleenwheels" where a BMW overcooked its brakes due to having them and I was surprised that the temperatures did come down fairly quickly if you kept some speed up after the brakes got really hot. You need to pump some air thru the brakes and it takes some speed to do that to cool them down. For these reasons, a bit of coasting down and light braking (letting the aero drag do some of the work first), followed by a firm application to slow you down, and then a coasting bit at around 40 mph with light braking is probably the best way to end up with the coolest brakes at the end of the run.
Bad advice downshift over rev slowing the motor is the fastest way to blow up an engine brake pads and discs are cheap drive around to cool them off between runs
