So if you are a 90-pound woman who is armed and a 6 foot 8, 300 pound man threatens to beat you to death and comes at you, you cannot shoot him?
Threats to do bodily harm or death is a crime. He can make a threat, but if he comes at you, then it is assault. That is a crime. You can respond by lethal force.
You simply CAN NOT get into a bar room brawl after an arguement and pull a gun. You are equally responsible for the fight.
I'm beginning to think that if the 6 foor 8, 300 pound man shot the woman and claimed he feared for his life then there aren't a whole lot of places where he'd be convicted.