There is an exact formula for class ranking somewhere in the bowels of this site.
It is a formula...they take your ranking multiply, divided and throw it into the washing machine. Just joking, but you get the drift, there is an algorithm.
This maybe hard to read, but please understand I am saying this with kindness.
Sled is correct that score matters a lot more than you can imagine. It is their first true impression of you. When weighing you against the other 24 100s.
~ You are lucky to be in such a small unit. DSs unit had @250+ cadets, 100 of them being 100s. Their attrition rate was 25% from 100 to 200. 45% from200/250 to 300. Maybe 5-10% for 300/400s. They(cadre) didn't know a cadets name first unless they were on the very top or the very bottom.
This is where it comes back to the PFA. That is a first impression. If I were you, spring break is coming up. Workout everyday regardless of weather. When the end of the semester rolls around for your PFA get 97+. Repeat during the summer so you max day one.
~ Your CWC/CVWC/FCC will take notice. They have weekly meetings with the Cadre for insight on cadets.
~~ DS as cadet was an FCC and he had to write reviews for all 20 cadets in his flight. He would show up at 5 for the weekly meeting. He was also the wing PT leader one semester. He was able to tell them which cadet in the unit in his mind was the weakest.
~~~ If it is between you and another cadet between being top 50% and bottom 50% and both have the exact same cgpa, someone has to be the bottom 49% and that PT score could be the deciding factor.
~~~~ perception matters and that is part of the equation.
The PFA is a nice chunk of your WCS and the CoC can use that as a determining factor when it comes to ranking = double ding. If your unit is like my DSs the PT instructor jobs go to those that max. Equaling now a triple ding because another cadet is the flight PT instructor as a 200 and you are not