That's been the basic order of purchases for the US just about every game we've played of the newest Alpha setup, and it works beautifully at slowing down and/or containing Japan. It's a kickass setup to really bring some pain to Japan and I'm a huge fan of it. But it's nowhere near ready on the Atlantic side to do much of anything but die, and then the US will need to spend its next two turns or so worth of IPC's to get its Atlantic fleet to the point where it can survive a German attack, and then another turn or two in order to have sufficient transports and men to begin dropping into Europe. Which brings me back to my earlier statements, it's very tough for the US to exert any real pressure on Germany before its gobbled up enough of Russia that it can turn around and begin fending off Allied landings while trickling enough reinforcements to Barbarossa via Leningrad and Stalingrad to eventually take Moscow as well. Once again, why does Germany need even more help? This is just stacking the odds further and further in its favor. I would like to draw attention again to the fact that these games were played without the +3 IPC bonus per territory gained in the initial Barbarossa turn, and yet Larry is looking at adding even more to Germany. If anything, its Japan that ultimately needs the help.
Honestly the only way I've found for the US to make a real and lasting impact on the European side after a string of purchases like those you described was through helping the UK retake and hold Cairo while protecting London.
Stand by Chompers, looks like we got a new Alpha+2 to deal with. Got to check out the changes.