>>4178106Full frame and excellent autofocus will get you the most keepers. Sony a7iv is good value.
For lenses, you want to strike a balance between wide aperture to let in more light and lightweight elements for faster af, f1.8 primes would be good, and will keep the camera light and nimble. Or you could go the other way to something like a tamron 35-150 f2-2.8 to quickly get the best framing for each shot - being able to get closer, more detailed shots of action is invaluable, depends if you want to get in amongst the rioters or stand just outside the action.
And big flashes will add drama.
