Suppose Japan moves everything off Kwangsi and appears to be planning a move on India J3.
A naval defense of India might start by taking Sumatra and moving the carrier (& tac) and other ships from z98 and z71 to reach z39 by round 2. Also throw in the ANZAC destroyer and cruiser, and the French destroyer. UK Pacific starts with $17 and earns $21 for a grand total of of $38. Lets suppose they save up and build 2 carriers and a sub. They now have 1 sub, 5 destroyers, 3 cruisers, 1 battleship, and 3 carriers.
Now let’s suppose the Russians fly 2 fighters to Kazakhstan and then to India (assuming they have been attacked by G3 and east Persia has been activated so they can fly over it). If UK leaves 1 plane on India and 3 on the carriers, and then ANZAC lands 3 fighters from Queensland on the carriers, the defense now has the fleet listed above plus 2 tac and 7 fighters including the Russians. If the Russians are not available, then build 1 sub, 1 carrier and 2 destroyers, with 1 UK and 3 ANZAC planes on the 2 carriers.
When japan attacks z39 they will not have a landing spot for all of their fighters and tactical bombers from Kwangsi, even with an airbase. They will have their ships, bombers, carrier based planes that may land on Yunnan or Shan state if available, and 6 Kwangsi based planes that can land on the carriers. Their other planes will support the amphibious landing. Japan may win the naval and land battles to take India but their fleet and airforce will be seriously drained.
If Japan chickens out (ie because they didn’t have Yunnan or Shan) and the Americans have put ships off Queensland, then the combined fleets might merge round 3, perhaps next to an allied territory where an airbase can be built (Sumatra or Java?). Merging those fleets is easier said than done though.