Thank you for the reply @HalcyonKnight96 !
It would really be helpful for people to have an idea of how much playtime is needed for calibration. I understand if you cannot let us know for some internal reason.
Once map makers have a sense of how much playtime/unique plays is required they can adjust their expectations for the map and also decide if they want to push a change through or not as it would affect calibration.
I much prefer the UEFN method right now as I know if people are in one of my UEFN maps they will at least get some XP.
Anyway I appreciate the input, and my guess is that you basically need a fairly popular map to have calibration completed.