We have abandoned that game. Every game went something like this:

G1, build 2 bombers. Force the allies to invest in navy to be able to enter/come close to europe mainland, with the threat of planes and possibly a few "meatshield"subs. Never a german navy, just a sub or two to save the airforce.
And when the allies have enough navy to come close to europe, then they have spent too much in navy, and your air force simply switch to fighting on land instead with freshly made tanks and awaiting inf. And in general mass tanks, beat russia.

J1. Build 2 factories. J2. Tankstankstanks, beat India and Russia with the help of air forces.  Gather together your navy into one force to protect mainland Japan. This force is big enough to buy Japan a lot(!) of time, and within then your tanks will reign supreme and give you enough income to win against american aggression.