I have been using a few tecniques, and it depends on how the board looks, but generally I prefer to stand strong and fight for France, almost ignoring NW Europe. I just take it back NW Europe with inf+fgt+bmr.
If UK and USA are going after Germany first, my building strategy for Germany and Italy is to maximise quantity. I always build 10 units for Germany and try to build 6 for Italy. I always build at least one German bomber, and if possible some Italian air unit to. Bombers are so flexible. They may hit both on the west and east front, and may threaten the invading navy units.
When UK and USA go for Germany first, try to secure the Japanese NO as quick as possible, then swiftly turn against USA with a heavy invading force. Build 1-2 bombers per turn. Then start pumping in hardware and bombers in to Alaska. This is not only putting pressure against USA, but the bombers in Alaska also threatens the US naval units in SZ 1 & 9. And if also Germany and Italy also is heaving a strong bomber force, this becomes a very serious threat against the Allied navy units. USA/UK must respond to the threat, or they will simply loose their navy. When USA goes for Germany, I think its very effective for Japan to put pressure on USA. If USA don’t answer against the treat, he will lose West USA.
Well… some thoughts…
Regards,
Håkan