40 of the 63 fighters available are ENY 20 or more, ENY should never be a problem.
My personal top five for this tour so far:
Yak-9U
Ki-84-Ia
Brewster B-239
I-16
C.205
The first sub-20 ENY birds on my 'kills in' list are tied for 10th with the F4F-4.
ENY? ENY? We don't need no stinkin' ENY.