Another calculation I thought of: The number of teams a region sends to championship from the region championship is: the number of teams in that region as compared to the number of overall teams; this percentage is the percentage of teams at championship that are representative of that region(the calculations I ended up with when comparing MAR and FIM were both off by about 4 teams less, so I'm guessing the number of overall teams is incorrect).
Based off last year(team numbers all taken from
this map):
There were 2341 teams registered. 400 at championships. With 151 teams in NEFIRST, that's about 6.45% which is about 25 teams(realistically with the data probably a lower number). NEFIRST is replacing 5 district events, so that means 5 Chairman's, also adding on 1 RAS, 1 EI(this could change as MAR did 2 EI's this year), and 3 winning alliance teams means there should be about 10-15 "ranking qualifiers"*
*
of course, this is all just me being bored and in a number-crunching mood, and could all change dependent on how the NEFIRST board decided to do their points/ranking/qualifying system