Curious, how much of this is cannon v/s theory?
The overall balance of #s is odd when you think about what a navy maybe should look like.
Mostly canon, some theory. Also the occasional german novel semi-canon reference thrown in.
My thought process went like this: first, taking the fleets as they were in 2765. Finding every reference in 1sw, 2sw and TR 3075 and 3057 of named ships and classes I could.
Then, building out as much as I could on numbers by taking the rough numbers of 2765 squadrons and going out from there. So if there were 5 squadrons of:
"1 battlecruiser, 1 cruiser, 1 destroyer, 4 corvettes, 1 squadron of cargo dships (5) and 1 combat dship" (semi-quoting from one 2765 field report) and the same power had 5 small squadrons of 1 battlecruiser and 2 corvettes, then extrapolating on that to try and keep similar ratios of ships amongst.
However, I also wanted to make sure to limit a lot of the big ships as much as possible. I was surprised by the amount of Tharkad and Atreus class ships, for instance; it seemed like there were size limitations on how big the 5 Successor states could build, prior to and during the Star League era, and there was no chance to really build bigger than those... ever. That meant that I still had to fill in some gaps with some smaller ships, and then there are also lots of references to TH and SLDF hand-me-down ships. So... as much as it would have been cool to have had 1 battlecruiser for every 4 smaller warships, there were limits. The Lyrans and FWL get the closest to full battlecruiser squadrons. Meanwhile, the Dracs get the closest to a full carrier navy.
I haven't posted the others yet... see now below.