Imo, a good race setup is good for both mid and long runs...for me, there is no difference between those. A sprint setup is usually a bit looser, but that's about it.


P.S.
I don't understand this sentence:
"im good for about mid run then i have to start driving by my rf tire temps instead of lap times or standings"
Doesn't make sense imo...well, or maybe we have different definitions of mid and long runs. On a classic 1.5 mile cookie cutter track, I'd call up to 20 laps a sprint, 20-40 laps a mid run and 40+ laps a long run.
If you need tire temps as an indication for how hard you're running, you'd better have a look at them in the early stages of your stint. After the mid run is completed, there's only 20/25 laps left until you have to pit for fuel, so there's no need to take care of your tires anymore.