What is most likely to work is what you can will and can pull off consistently well under pressure. That is usually the most basic straight forward movements possible that flow well with everything else that you’ve drilled ad nauseum. These movements should primarily be your own strikes and not blocks. Blocks are the wrong mindset from the beginning. It’s defensive thinking. If you are going to cause an injury and do it first, think in terms of the utmost simplicity and effectiveness. This toolbox needs to be practiced slowly to learn the form and the targeting correctly. They need to be applied with real impact and they need to be done against a real person in a context that resembles their actual usage to the best of our abilities.
Martial arts instructors can never keep students with this material. If they taught it, students would practice these things a few times and think it’s too basic and want to know what else can you teach me. Teach me the good stuff. The good stuff is the most simple things like a palm strike or elbow strike to the face. A knee to the groin and so on. The more choices you have to choose from the more likely you will remember that you could have done this or could have done that after the fact of having your ass kicked. This is why new techniques are very dangerous. They tend to be new ideas that you venture into without having refined them physically and they add clutter to what is already there and unused. We need the most effective things to surface at the right time. If you can pull off a move most of the time in training, under pressure in a violent situation you will maybe be able to pull it off some of the time. If you can pull it off sometimes in training, you will likely not be able to pull it off at all when you really need it. None of this makes any difference at all if while under pressure you don’t do anything at all and get eaten up by somebody who pulls you into their sphere of dominance and control.