[Come and take it.]

If a criminal armed with pepper spray or a taser is going to attack me, would I be authorized to use deadly force?

On the justification that once attacked my physical ability to defend myself against being killed would be greatly hindered

or

In a scenario in which my kids were with me and the fear that once disabled the criminal would be free to harm my children.

This is hypothetical of course and the reason I am asking this is not to argue the point but simply to know what to do in the event that something like this took place and under the knowledge that they WERE going to use the device and not just THREATENED to use the device.

If I am not authorized to use deadly force, than what options would I have?