megafleets

For the GZG Overlord,

I'm contemplating getting a megafleet (or two) in the next 2 to 3 months
so I've been searching the archives for contents.  I found one posting
linked to a sale in the past that stated each megafleet contained 1
dreadnought, 2 battleships, etc, etc, etc...

Are these counts still in affect?

PS -> What's the reasoning in not including at least a single light
carrier in the fleet packs?

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Damo