Ack, w/o knowing the German/Japan/UK Defense (well land for UK anyways), it would be hard to think of buys, but I think as Russia can you really afford a tank anymore? Maybe one off the initial buy, but I would say 5inf/2art,6inf/1tank, 4inf/3art are your only three options w/o more info. I guess it comes down to what the frontline looks like…
With the British fleet sure to be gone now for sure in G1, G2, G3, etc, and having to defend India, a CV/2DD is out, and w/o DDs to back up a CV (because the 16 would probably go to India in some way), do you planeport to Russia? (2FTR, 3Inf {2inf/art}opening buy?) Or is Sealion likely here too?
I guess the US will have to be the Atlantic fleet, so do you go 1CV for each side and add a plane for US1? That would give you at best CA/DD/CV/2Trans East and DD/BB/CV w/ random sub (I always submerge, so I always have that, unless the DD that was talked about for Japan comes for the ride).