That's a lot of testing in that list, if you don't have the time to do all of that, what you could do is spend a bit of time checking out some of your theories.
For example, didn't you say recently that you found that the reason you got flyers on one of the EV's was due to using pellet lube?
You could, do some downrange chrono testing with and without lube to see if there are any noticeable differences in BC between lubed and unlubed. Or a difference in downrange velocity spread. Anything like that would give us a bit more information on what might be happening when a pellet is a 'flyer'.
Also... Do a test with a gun with an Ostler airstripper and a test on a gun without one..