Luckily, you don't have to reinvent the wheel. Subject matter experts like Lt. Colonel Dave Grossman, Loren Christensen, Michael J. Asken, Lt. Kevin Dillon, Tony Blauer, Gavin DeBecker, and the folks at the Force Science Institute work extensively on related subjects. References like "The Warrior Mindset," "On Combat," "Finding Your Zone," "The Gift of Fear," "Fighting Science, and "Unleash the Warrior Within" are must reads. Programs like Fight Science, Fight Quest, and Human Weapon that illustrate body mechanics and different fighting styles are a must see. If none of these concepts and references sounds familiar, the least of your worries is MMA.
Thoughts on Experience
With all of the training I have done in Asian martial arts over the past 37 years, I have been exposed to hundreds of individual techniques that can easily create thousands of possible combinations. As an officer, however, I tend to use a straight and reverse punch, the palm heel, elbow and knee strikes, the front kick, and a low roundhouse the most. Typically, one of these techniques leads me to a throw, arm bar takedown, or leg sweep. That's less than 10 techniques over 23 years.
I've practiced these few techniques to the point of unconscious competence. That's what you should be looking for when training to control aggression and combat violence. It's where you should spend the majority of your training time. It's better to have a handful of techniques you know well than a bagful you don't.
As a combatives instructor, I do not advocate police officers participating in martial sport. The reason is quite clear: How you train is how you perform. Unfortunately, this phrase has become so commonplace that people ignore its wisdom. Under real world conditions, you will default back to what you've done the most.