One more comment on military or police techniques vs MMA that cross trains and tests their skills:
While I'm not qualified to say, I have also seen some ex-military people argue that their training was practical but tended not to factor in as high a proportion of physical combat, since the percentage of time they spend preparing for less likely scenarios involving fighting without any weapons was low, whereas the MMA guys obviously specialized in that, so they argued that the MMA guys might win (unless of course the special forces types also trained in MMA too).
The opinions from other military and MMA types were mixed though, so I have no argument of my own to make there.
Last but not least:
@Cornfed, you mentioned stuff like knee stomps and other brutal fight-ending techniques, which would be great to know, but a caution you guys may already be aware of is that you need to be careful about being thrown in foreign prisons if the authorities decide you used more force than whatever they considered appropriate. Obviously, this takes due diligence for each area you'd be visiting.
Of course, if your life or the lives of innocent people under your protection are in danger, you should not hold back worrying about the safety or even survival of your attacker, I fully agree, but that doesn't mean you might not end up becoming legally the bad guy and doing some time even if you win the fight decisively.
In hyper-civilized places like Japan, for example, you could end up in serious legal trouble if the authorities deemed you used any more excessive force against an attacker than necessary, and in some cases may actually have expected you to run away to the nearest police koban squealing for help until the police save you, rather than actually fight yourself with any extreme force. So be warned.
P.S.
@Lucas88 though you had your falling out with Japan, you and some others here probably would've enjoyed the guy who wrote the GaijinAss blog and was also into MMA, though he unfortunately died young of unexpected heart failure (quite a while before covid, btw, probably a result of heavy exertions like power lifting as well as heavy combat sports).
I thought of him because he was a case who f***ed up another gaijin in a bar fight with his MMA skills, and the Japanese police and courts didn't approve of this, hence throwing him in Japanese prison for a stretch, which is actually where he learned to become fluent in Japanese from studying "Making Out in Japanese" volumes 1 and 2 while in isolation.
(He'd been nailing scores of Japanese women earlier while living there without even being able to speak Japanese, but then after being in prison studying in isolation, he actually became fluent and lived there after being released, and I think was married several times before unfortunately passing away young, I think while sitting on the toilet...)