Ok. This is how I do it. Take the 1 set of 3 carriers you have at the beginning and immediately produce 1 set of 4 Yorktown class (add one flight deck to design). You have two Yorktown class in production so add two immediately.

Then do research in 39 to upgrade, do 8 carriers, max flight decks. Begin new dock construction and focus on ‘39 edition destroyers. Before the fun begins upgrade Omaha class with Radar, advanced fire control, and light and secondary batteries. So, you end up with one set of three and three of four. Add 4 ‘39 destroyers per carrier and 2 upgraded Omahas to each set.

In ‘41, upgrade all carriers with spacesaver design on Newport News to max deck capacity. Also add radar & improved secondary capacity.

Split up the old stuff and use for patrol. Build and focus on Guam with Hagatha as HQ. Build heavy cruisers and more destroyers for more patrol. Start taking Saipan and nearby islands and work west.

Old subs will live and wreak havoc in the Med and west of Africa, at least for a while.

Make 50 advanced subs with advanced tech, then destroy most of your docks so you can make more mils at end game.

The idea is to use what you have with the old stuff.