All this information is hit and miss. (Reading Ayoobs bookis a big hit!)
When it all comes down to it, YOU are the final say on pulling the trigger, or using lethal force. Until you have been in that moment of gravest extreme, it really is literature and learning. The moment you have a grip on an instrument of lethal ability, and the resolve to use because of someone's ability to inflict severe bodily harm or death, opportunity to do said damage, and you are in jeopardy of said damage... That's when you will answer your own question. "At what point can I use lethal force?" No one here can make that determination for you, nor can they stand in your place after the decision is made.
When it all comes down to it, YOU are the final say on pulling the trigger, or using lethal force. Until you have been in that moment of gravest extreme, it really is literature and learning. The moment you have a grip on an instrument of lethal ability, and the resolve to use because of someone's ability to inflict severe bodily harm or death, opportunity to do said damage, and you are in jeopardy of said damage... That's when you will answer your own question. "At what point can I use lethal force?" No one here can make that determination for you, nor can they stand in your place after the decision is made.