Re: best tactical holster
I would check with your other swat team members and see what works for them, see if you have some sort of policy on holsters.
BUT, take into account all people are different, built different, so what works for one may or may not work for others.
The best option is to try several, try them out while you shoot some action pistol matches. That will give you a pretty good ideal what works while you "run, dodge, and jump".
As to lights, I spent 20 years as a cop, doing hundreds if not thousands of building searches, most alone. I wouldn't put a light on my gun for love nor money. Again, that's just my opinion, based on how I worked.
Personally I wouldn't have a thigh holster if you give me one, but that's me, some people like them, some don't.