I’ve toyed with the idea of 100% navy in Round 1 and Round 2 for Germany. Subs and carrier in SZ 5 and subs and carrier in SZ 14. Means you’ll be really weak against Russia militarily, but the allies will be having kittens trying to figure out ways to land in Africa and Europe for a long time.
The fighter strat sounds decent, but this one sounds bad IMO. Britain would probably just build a massive fleet of fighters and then eventually decimate your navy with minimal losses. Meanwhile, building 0 ground units the first 2 turns would be giving away a lot of territory to Russia, making it an economically significant force. Heavy US/UK airforce would lock both your fleets in their respective seas, unable to unify…then the baltic fleet would fall, as it’s within two spaces of the UK, and the Med. fleet would be mostly useless ( as if it ever moved to a location where it actually threatened anything, it would be within range of the air force).
You delay help to Russia, but Russia no longer needs help!