I completely understand the idea of ENY but believe it was an HTC response to complaints from multiple subscribers that fell victim to a HO attack.
A Chog is not a deathstar
In that case the ME-410 with Mk103's should be the highest perked bird

C-hog had a very high K/d ratio and no-one flew any other F4u type, much like if they put 4*Hispano and 4*.50 on a A20, or a 3-gun La-7

To ack-ack : The A8 ENY was lowered from 25 to 20 according to Karnak because of it's higher usage, even though the A5 normally have a higher k/d ratio.
The Me-410 is an example how a single player can completely change the usage of a model and its K/D (Torquila april 2015 tour)