Navy and Airforce are expensive and cannot take and hold land. If you can convince Germany to make heavy fleet or airforce purchases, I think you are miles ahead in the game.
Furthermore, if you can kick Germany out, even if you give Japan Africa, you are miles ahead. A germany collecting 35 IPC or less a round is much easier to defeat then a Germany earming greater then 40 IPC a round.
And anyway, if you don’t go heavy from round 1, just give it up for the classic furlough in London followed by assaults on Norway/Karelia route. You need the round 1 landings to get to Persia before Japan is strong enough to repell you.
Axis has the gist of it. By going N. Africa you force Germany to move faster then normal in an effort to break Russia before America can break Japan’s ability to wage war on the mainland. This is also true of a KJF strategy, Japan is diverted leaving Germany solo against two powers.
Though, I don’t think Japan has a chance in hell of blocking the Allies in Persia. Not without stellar dice. You have 8 units hitting Persia on Turn 5, 4 British, 4 Amiercan plus fighters and bombers they can bring in. On Turn 6 you have 12 more, 4 british, 8 American. After that it’s 10-12 per round from America. You can see how Japan is going to get quickly bogged down in India with 100% of it’s mainland production and whatever else it can spare going to India, which is far away from Moscow, just to prevent America from taking her mainland industrial complexes.
Who cares if Japan is making 50 IPC a round if all of it goes to hold America? That leaves 60 IPC between Russia and England to hit Germany who is making 20-35 IPC a round depending on the dice.
I’ll take that trade. Sure, America never takes a single control marker out of her box the entire game, but who cares? This is not a game of glorify America by making the world green, it’s a game of capture the flag!