@Bunnies:
You’ve said what your brother did (Russian infantry builds, UK landing in Europe), but you need to be more specific if you want to receive more specific advice. What does he do with US? The more specific you can be, right down to the specific combat moves, the more someone will be able to help you.
More particularly, what do you do with Germany and Japan? What are your purchases? What are your moves?
Need I say more?
Mace Windu Flying Jedi strategy. FEEL THE FORCE!
Germany? With Germany I mostly build tanks and some fighters. I try to flank SU and go for sea lion and send some infantry to Africa
and with Japan? Fighters and transports mostly but also some other navy units. I try to take SU and UK closest territories and at the same time I try to take some of the US islands and go for Australia.