Some patterns exist here.
For reference the numbers are a code for that they are,
First digit: airbrush PSI [15/20/25/30] (1-4)
Second digit: distance [8-12cm/15-20cm] (1-2) (131-134 was originally at 25-30cm, which was just silly far and nobody would ever paint like that, so I cut it out for subsequent runs)
third digit: coating strategy:
>1 - one thick coat (not enough to pool or drip ofc)
>2 - two normal coats
>3 - 4 thin coats
>4 - 1 thin coat, then 1 thick coat

This is with monument's black airbrush primer, unthinned, shaken a lot before use and immediately before each airbrush refill (2 to 3 times per PSI change), and the airbrush thoroughly cleaned with lacquer thinner between each PSI change as well so it's as clean as it gets.

I sorted them all and then scored them based on their position from 1-5
(top 10% - 5, 70-90% - 4, 30-70% - 3, 10-30% - 2, 0-10% - 1)
obviously a little subjective, but I'm hoping the broad categories smooth that out a bit.

>Spray distance
had virtually no impact (far scored 1 point higher, not even close to statistically significant in this data). It did have a notably worse score on the 4-thin-coats than the close distance, so I would probably recommend spraying closer anyway for higher chance at consistently better coats, but overall not significant, especially given the results of the 4-thin-coats option which we'll get to.

>PSI
15 < 20 < 25 == 30. That was the highest I tested, but probably starts to hit diminishing returns and worse results soon after 30.

>coating strategy
This is the interesting one with by far the biggest difference across all other factors. 4 thin coats is by far the worst option. 2 medium coats is next with a about a 30% improvement, then 1 thin+1 thick coat sees a big improvement, and 1 thick coat is the winner. Both nearly double the score of 4 thin coats.