No you have to let the western allies handle the navy stuff (in the Atlantic). As Russia I like to buy 1 air unit at least every other round (ftr/tac). In most games Germany does a SL fake (sometimes they go though w/it), and I like to be able threaten the German navy w/air when they come through the Baltic (makes them spend $ on carrier). When they are ready to hit Leningrad, I may just back out to counter attack (kill their ground units), and use the air to end the sea threat. I may not hit the navy, but they at least have to think about it. If I go ahead and nail the German navy in the Baltic, it comes w/guarantee that because I did the dirty deed for the western allies, they will replace my air power (at some point). R1 I normally buy 1 plane some art/inf for the front (you have to have art to push/delay the Germans, inf alone are not to scary). You also need to be aware of what they can bring at any one tt at the front (seeing many one tt massive army pushes by Germany), and what you can do in a counter attack (if anything).
You also need inf stacks at front lines (mostly south) to keep Italy from being able to can-opener easily (make sure that the deeper Italy goes that they lose units along the way so when the axis gets closer, Italy isn’t involved. I also like to get my arm up, w/few mech. A Russian mobile force is necessary, especially if you also have Jap lurking in your back field, or you need to swing from north to south (or wherever).
By all means if your in trouble (maybe to aggressive), don’t worry about that silly 5 IPC NO connected to sz 125 (that you normally don’t get to often anyway). Get the allies involved, either through direct help on red tt’s (air for def etc…) or maybe through landings in Scandinavia, or other parts of Europe. If the Germans, Italians & Japs are all pushing into Russia, then you do what you have to. I’ve seen all six major powers fighting in Russia. Its a BS move, but whatever works. The western allies can be in Russia, and still be hassling the Euro coast, Med, Chinese coast, or DEI (if Jap is pushing hard to Russia (mech/tanks), they are not investing much to rebuild there navy/air-make them pay).