3 Turns, remember you arn’t attacking the American fleet unless it’s next to you.
42+40+38 = 120. 2 Carriers, 1 Fighter, 2 Destroyers, 8 Transports on top of 3 transports, 1 battleship, 2 destroyers and 3 fighters you start with and keep past J1.
You going to attack that with 2 battleships, 2 carriers, 6 fighters, 1 bomber and 4-8 transports??? Or are you going to spend valuable Japanese income building ships to defend/attack that force and risk being pushed off the mainland by British aggression? (And you’ll need a British IC in India or America’s wasting their time.) Leave the transport on India, get the fighter there so you have 5 infantry, 1 fighter, 1 AA vs whatever Japan brings, the transport stops any Battleships from firing and allows you time to get 3 armor, 2 fighters more in there.
You can put up a very manly attack force in India to counter a Japan who’s building navy to stop America.
Yea, Germany will fight Russia and England. (England’s still probably moving 3-5 units into Russia a turn.) And they’ll eventually over-whem them, but not before Japan’s off the mainland and is down some of her larger islands (East Indies, Borneo and Philippines. 2 of which will probably have American IC’s on them shortly to full their war machine so they don’t have to go back to the States for manpower.)
Japan’s now stuck on her island with a few inconsequential holdings in the Pacific, unable to effectively prosecute the war and now you can start pumping out 7 or 8 tanks with America, 3 tanks with England and drive them into Germany.
(And yes, I’m assuming USA/England still drop off forces into Africa to resecure it from the West. Germany gunna bleed off forces from the Russian front to take care of 8 Allied units in Libya/Algeria/Egypt, or give up Africa?)
As I said. Your goal is to dwindle axis forces by pulling them way out of position and/or destroying them long enough to over whelm them with Americans. If you let Mercy pull 40 infantry back into Germany you’re the one pulled out of position. Much easier to crush Japan. Now Geramny can turtle all they want, you’ll just hammer em over and over and over again. (Japan’s stuck on their island anyway.)