As a friend of mine has rather painfully demonstrated at my expense, Russia getting into Scandinavia can be devastating for Germany, and in principle I think it’s fine to build up the American bomber force to as many as 8 bombers, and then send it to kill the German Baltic fleet and/or the Italian Med fleet. Certainly it’s easier for Russia to grab Scandinavia if the Baltic fleet is sunk.
But this whole idea of building nothing but bombers with the USA for 5+ turns strikes me as way overblown, for some of the reasons Afrikakorps has been pointing out. If Britain focuses on Italy while the USA sends bombers to Europe, then Japan is free to annihilate China and capture India. A stack of bombers is not going to be enough to contain a Japan that has already taken out China and India – the USA just doesn’t earn enough to trade bombers against Japanese mechanized infantry.
On the other hand, if Britain builds a Persia factory and uses it to send troops east, builds ships in South Africa, sends fighters to India, etc., then Italy is free to take north Africa, clear the Med, and use the resulting cash to send mechs and tanks east to Stalingrad and the Caucasus. At that point, Italy is pulling in 32+ IPCs per turn, and so even if Germany is only collecting 40 IPCs and losing 10 of those to strategic bombing, then the Euroaxis are still substantially out-earning Russia even if Russia is holding Scandinavia. Russia’s not strong enough to hold out against the Euroaxis in that situation, and will be slowly pushed back – and, meanwhile, Japan’s probably not doing so badly. Sure, the pressure on land from UK Pacific, Russia, and China is formidable and will help to keep Japan in check, but without the need to spend heavily in the water to counter a growing US Pacific fleet, Japan can afford to fight all of the eastern Allied powers at once.
My point is that it’s probably a good idea to build a US bomber fleet in many games – perhaps a much better idea than this forum has traditionally believed – but even a really good US tactic is not the same thing as a “silver bullet” that can knock the Axis out of the game. All three Axis powers still have to be contained. A bomber fleet can contain Germany if it’s sent to kill the Baltic fleet, or it can contain Italy if it’s sent to kill the Med fleet, but you can’t kill both fleets fast enough to contain both Euroaxis, and that means at least one Axis power will be left unchecked unless America follows up on the initial bombing rush with an actual naval buildup.