Try these first turn buys as the Allies:
Russia: 3inf, 3 tanks
(Attack Western Russia, and optionally also Ukraine. Be more aggressive, you can usually push Germany back pretty far, your income should never be lower than 26.)
UK: 1 Carrier, 2 Destroyers, OR 1 Carrier, 1 Cruiser, 1 art, OR 1 Carrier, 1 Destroyer, 1 Transport (how many German planes are within reach determines which one you choose to go with)
(Either Setup for Operation Torch with USA, landing in Algeria, or alternatively, take Norway first turn, then help Russia through Karelia. Build your navy in the same sz as where you Battleship ends up. Make sure to Position your 2 fighters on the Carrier, and make sure there will be 2 fighters with it the whole game. Build 1-2 more Cruiser/Destroyers the second turn just to make sure the Germans don’t attack you, however if you will be combining fleets with the USA there is no need to buy any more navy.)
USA: (build in Atlantic)
if combining fleets with UK: 1 Carrier, 1 Destroyer, 2 Transports, 2 Infantry
if not combining, or wish to feel safer: 1 Carrier, 1 Cruiser, 1 Destroyer, 1 Transport
(Either Setup for landing in Algeria, or Setup for landing somewhere in Europe. I prefer Algeria in Revised, not sure yet on this version since you have to wait the first turn with america before landing anywhere. If you will be landing in Algeria and wish to land in Italy later in the game, you will need split up your navy to keep the transport chain going, and therefore you will be bringing your submarine and battleship from the pacific over to the atlantic, they will both make it to sz12 on the third turn, which means on the second turn you should buy: 1 Carrier, 2 Destroyers, 1 Transport, 1 Artillery. You will need a 4th Fighter for that Carrier, so on the 3rd turn buy: 1 fighter, 2 Transports, 3 infantry, 1 tank)
Both of the American fleets, and also the UK fleet, assumed to each be separate from each other, would survive an attack by 2 subs, 4 fighters, 1 bomber.
However, if the Germans position 6 fighters in France, 1 Bomber in Germany, and still have their 3 subs in range, then each of these fleets will die, taking out on average 5-6 German units with them. However, it is very obvious when Germany consolidates their airforce to be within range of your navy, and therefore you can take preventative measures by either moving out of range, or combining fleets, or building more fleet. Any time Germany commits their airforce to be within range of Allied boats, that means it is not within range of Russian territories, which is good for you anyway. Germany can not afford to replace her airforce, while you can easily replace any single one of the above fleets.
try that out for size