let's assume a pre-emtive strike is warranted as you have an honestly held belief that another individual is going to assault you and that individual is bigger, stronger and fitter than you.
what would be your choice of strike?
i think a shin kick or a 4 finger jab to the neck or throat before legging it. anyone have any better ideas?
Now that everyone has covered semantics and the law, what you posted is fine depending on the situation. You do what's necessary to neutralize the threat, no more, no less. This can be something more passive, like spinning the guy around and push him away while you make an exit. Or it could be something more extreme, like an eye gouge.
In our system, we do have several offensive SD techs with variations. I taught a couple seminars on offensive techs (covering various level of severity) that went over very well.