You're changing the hypothetical and added mere possibilities. Anything is possible. That's why self defense is considered an imperfect legal remedy, and it's one reason why it is said "the law abhors self help."

When the qualified privilege to use reasonable force in defense of yourself or others proves insufficient, the perfect remedy is in a civil action for wrongful death.

What matters in evaluating the use of force, the privilege only exists where these hypotheticals are reasonably probable.

What fact would you hang your hat on here, to tell the judge and jury that you probably had absolutely no choice but to try and kill, especially when, as here, you are proved to have been mistakes, and were not in physical danger and the putative aggressor was unarmed?