I strongly agree with larrymarx – these grand Russian strategies make plenty of sense if Germany is screwing around, but if Germany and Italy are gunning straight for Moscow, then you need to just build infantry and defend Moscow. That’s a thankless and boring task for the Russians, especially if you’ve got 6 players at the table and running Russia is your only job, but nobody said life was fair.
The arguments about “oh, I can still place 10 units a turn in Moscow,” and “oh, artillery isn’t that expensive anyway” strike me as wishful thinking. You need to place 13+ units a turn to defend Moscow against an all-out G6/I6 attack on Moscow. Some of those units will have to go in Kiev or Stalingrad and then march to Moscow. That’s fine; that’s how that works. Eventually, you may get to a point where it makes more sense to build 2 mech in Stalingrad instead of 3 infantry in Stalingrad, because infantry in Stalingrad won’t have time to march to Moscow before the key battle. That’s fine too. But you can’t just wish away the extra cost of building your entire army out of 4 IPC artillery & mech. inf. If your units are 33% more expensive, then you have 33% fewer units that still each defend on a roll of 2, and that means what should be a nailbiter for Germany will instead be a blowout victory, every time.
The arguments about how artillery is going to make the German army think twice about advancing and/or allow you to launch a devastating counter-attack before G6 are at least interesting, but in the absence of specific details, I’m not convinced. Show me a specific attack on a specific turn that you think you can pull off in a way that actually slows down the German advance, and maybe I’ll come around on that one. For the most part, I think the Germans are going to be able to easily combine their stacks and keep marching forward.
Can you hold Leningrad for an extra turn if you stack your units there and build mech. inf? Probably, but I’m not convinced that it’s a worthwhile gambit. Just based on your starting troops at setup, you’re going to have about a dozen regular infantry in Leningrad (nominally worth 36 IPCs) that will wind up trapped or killed in the north and unable to participate in the battle for Moscow, and that will plausibly cost you more than the 14-ish IPC swing you get from holding Leningrad/Archangel for one extra turn.
More generally, going back to the main idea of building a large American bomber fleet, I want to point out that the fleet can’t arrive in the Baltic until US3 in most games – which means that Germany gets three turns to reinforce Scandinavia, which is usually plenty to protect it against the Russians, who must (as discussed above) begin retreating east before R3, or else divert a large stack of troops that can’t participate in the Moscow battle. I could see the American bomber fleet working well with a British invasion of Norway, since UK3/UK4 is roughly when the UK will be in position to rebuild its Atlantic fleet to the point where it can operate safely on the fringes of German territory, like the Norwegian Sea. Norway is the big chokepoint for Germany anyway; that’s where their NO is.
But if the plan is to use the American bombers to protect a Russian invasion of Scandinavia, I think the timing is wrong – by the time the Americans can actually shut down the Baltic fleet, the Russians need to be either already sitting in Norway (to collect enough income to raise new units to defend Moscow despite the diversion of the northern armies), or retreating toward Moscow (to defend it against a concentrated German/Italian assault). You can’t afford to wait to start invading Norway with after the Americans have killed the Baltic Fleet, because you won’t have enough time to collect enough income to pay for your investment, but you also can’t afford to invade Norway before the Americans have killed the Baltic Fleet, because you just don’t have enough troops in the region to deal with the starting Scandinavian garrisons plus the possibility of naval reinforcement plus naval bombardments plus the Luftwaffe.