If Japan is focused on taking out India, then I like to move my navy out around the pacific just to be nuisance to Japan (convoy raids, force them to keep escorts with transports, etc.) I try not to get them into a position where they can get ambushed by aircraft or a fleet. I like to buy a transport so that I can take Islands that the Japanese are not defending.
I actually kind of like playing as ANZAC. I normally do not get attacked (since I try to keep my ships away from the enemy) and I get to be a general pain in the a$$ to the Japanese.