Instead of practicing running, jumping and stabbing in all directions, it might be a really good idea to work on perfecting the basics. It is only when you have truly perfected the basics that a person is ready to learn advanced skills. Nothing will end a criminal attack like a smooth draw and an accurate hit to the vital zone.
Nearly 40 years ago my first engineering mentor, Everett Nelson at Boeing, strongly advocated for the KISS principle. Keep It Simple Stupid.
This has served me well professionally in hardware, as well as software, design and development. I have found that one of the best indicators of a poor or novice engineer is the complexity of their designs. And if you knew enough of the history of Boomershoot targets you would recognize the evolution to better targets was in large part about making things more simple.
The self-defense, unarmed as well as armed, techniques taught at Insights also reflect this philosophy and is something I have always appreciated. Some other schools, as alluded to in the quoted article, show strong indications they are poor or novice designers of self-defense techniques.