Good thread...lots to think about which reminded me of Wild Bill Hickcock. He practiced a lot, carried two guns, kept fresh ammo in his guns, claimed accuracy more important than speed but speed is important. Old adage, aim small, miss small. And his mindset was to get the advantage - did this by correctly assessing threat and willingness to use all the force necessary to win. Seems to me Wild Bill has a lot to offer us. Skills, mindset, and equipment.
A modern Israeli warrior, Eugene Socket, would be on the side of carrying more ammo. Ammo is good, skills are good, proper mindset is good, having the right weapon(s) with you are good. Imagine putting all this together with a little bit of luck should increase one's chance to survive.