I have been wanting to play that game with america. If japan goes all out after India it falls into the strategy even better.
I THINK the US could pump troops from alaska into siberia threatening all kinds of stuff if that japanese navy wanders too far south.
If the imperial navy stays near japan sending only a minor amount of troops to the DEI India’s air force and modest navy become more relevant. The round 4 clash between the imperial navy and the american fleet should be pretty even and america wins an even trade.
In the atlantic would you send a bomber to england and offer a supporting destroyer and transport a turn? The British navy better have their stuff together or else germany……