Dude, in every horde there is always* a line of planes coming INTO that horde at 10-15k and ones leaving that horde shot up and hanged up, leaking engine collant and flying low to avoid detection.
You dont throw yourself head long into the horde, you stand back and pick all the other suckers off untill the "enemy horde" numbers are no longer being reinforced, and thus..the horde go's elsewhere after a hour or so.'
Simple.