Assuming you are armed, and it is a one-to-one confrontation like this, there is a wild card that you might pull before your gun. It will light up his brain like a Christmas tree because of its unexpected nature, and could very well give him a powerful “flight” stimulus.
In an aggressive manner, use the ‘n’ word.
“What did you say to me, ‘n’?”
For a lot of black people, a white person using the ‘n’ word like that is a sign of exceptional danger. It is not a time to be offended, it is a time for them to run for their life, because the assumption is that the white person is homicidally dangerous.
While most people have been strongly conditioned to never use that word in public, it is far better, if possible, to use it instead of your gun.
That's one method to distract and confuse. Mine would be to begin screaming at them "You won't get me! I'm not going down! I've killed two and what's another two!!". Act unhinged, draw attention from others in the area. The punks will withdraw. If not, then pull your knife and use it if they come closer.
older blacks may think that way. younger ones will not and will proceed to engage.