First, this trhead should not be a poll. Is only a question.
For India IC surviving J1, is need a tank from russians and all you can send to India, or Japan can simply send all they can to India with reasonable chance of taking (or weakening so much that is easy take it on J2. Also is a must send the indian dd to kill z59 trannie.
For preventing G2 or G3 Sea Lion, is better send the RAF to kill the baltic fleet (or at least, kill the trannie). Even if you lose the figs, is better play safe and not risking lose England. Of course, a G1 ac is another history.
For conserving Indian IC post J3, is needed sending all you can to India: surviving figs from RAF, bomber, USA fighter from Hawaii, maybe some USSR tanks (tanks, because they can back to Stalingrad in 1 move if Germany is getting so strong), and buying both Sinkiang IC and Pacific USA’s fleet (at least 2 turns of fleet).
That means UK and USA are going to press less on Germany, so better if you buy tanks or infs for India, not figs, or you’ll have a hard time in Europe. If Germany not kills Canadian trannie, UK can send (at least) 4 units to Africa/Norway/Arkangel a turn and USA can send token forces from East Coast, but for this, you cannot spend 30 ipcs on figs on UK2 or Luftwaffe will kill the allied boats.
Thus, Indian IC is difficult to play, but can be done. Of course, a z8 sub bid can kill this strategy completely, and a even z14 trannie can still be annoying (buff, even a Japan trannie in East Indies :-P). Not always playable, as you see, but when I can, I like trying it.