This is pretty awesome. Although i think your game will show how a sea-lion play for the Axis is kinda weak. You should also record your turn 3 positions, so you can start fresh games with France and London already captured.
As for strategies.
Russia could try for some very interesting tactics, like moving through the Mid-East, pick up the extra INF at Persia, and move onto India. This would free up strain on the U.S, and it would allow them to throw a bit more money around.
Or Russia could just go hard on Germany. Russia (from what you describe) should have around 50ish IPCs. Which should be enough to kill off Germany, as long as U.S.A pitches in.
Russia should get Norway. Troops from a U.S.A IC would take 6 turns to reach Berlin, and multinational forces don’t work to well anyway.
As for U.K, well, all they can and should do is build as much as they can in South Africa to stop Italy from becoming a monster.
China just needs to live. Otherwise, Japan might get board and will probably try to drill into Russia’s behind, or through Siberia.
ANZACs should probably try annoying Japan by fortifying any of the DEI. Other than that, make sure to keep an eye-out if Japan decides to switch route and take Sydney instead.
U.S.A should go towards Germany a little. But mostly towards Japan.
As for the Axis.
Germany will probably try to survive long enough for Japan to win, and for Italy to do something. But they will die because their 30ish IPCs will not sustain them against Russia, and landings in Normandy/Belgium.
I’m not entirely sure how fast Italy’s going in Africa, but whatever speed, they need to be slowed down. U.K should just build troops in South Africa. That should keep them busy.
Japan is the real enemy. U.S.A should just keep ferrying troops into Hawaii. Then into Sydney, you never know.
All the Allies really need to do is choose to go hard Germany, or hard Japan.