If you really want to go after the Japs though, how about something like this for US1:
Buy 2 ss, 1 bmr, 1 tp, 3 inf.
The tp and inf go to EUS to start a shuck into Africa (protected by British fleet). That way, you still keep pressure on on Italy and Germany.
Bring the sz44 dd, cv, and ftr, along with the Hawaiian fighter, to sz56. Also stack your mainland ftrs and bmrs on WUS. This will give you a possible attack force of: 2 ss, 1-2 dd, 1 cv, 4 ftr, 3 bmr, enought to cripple or outright kill most of the IJN. So this will create a massive dead-zone everywhere two spaces out from sz56, which ncludes Iwo Jima, Wake, Midway, Carolines, Hawaii, and Solomons.
You could even take the Carolines US1 if your tp survived and Japan left it empty (which they likely will). This will force them to waste at least a tp and some ground units to take it back, or UK gets its bonus. If they try to defend the tp, you can kill whatever they put in that sz. If they don’t defend it, you can kill it for free with a bomber next turn, stranding the ground units there.
On US2 you could buy a few more subs, then advance the 2 you have, keeping them within the dead-zone but within range of the sea of Japan. Make sure to always keep your subs in separate sea zones, obviously. Then land your bombers in Alaska or Midway, and buy a second carrier for sz56 so all 4 fighters are in range too. Now you’ve forced Japan to build more navy, or lose what they have.
Of course, because bombers are so cost-effective at killing fleet, they won’t be able to keep up.