I’d personally go for a turn 2 war dec, with a J3 India crush, J4 at the absolute latest. If UK pulls back planes/whatnot eat up more of the DEI on turn 2/3. You still want India to fall on turn 3. If the US ignores you at least get Pearl and some boats doing some convoy disruption and start working on ANZAC while pushing after Africa.
As far as China, just take Yunnan turn 1 and place a crapton of planes down there. On turn 2 retake Yunnan and air strafe China’s inf stack in Szechwan to kill there inf stack. At that point china is reduced to nothing dangerous.
After that decide on hitting the US hard with a ground invasion, or going after africa/russia hard in the middle of the board. With 4 IPC mech inf, and a 70 IPC income russia is going to cry, as far as the US with a naval base in Alaska and a major IC in Korea and/or Manchuria your talking a 20+ unit shuck, and that’s nothing to sneeze at.
If the allies go hard after you, then you just need to stand your ground using Phi and Japan as staging zones to keep hold on the DEI/India. If the US spends less than 40-50 a turn they cannot compete and you can smash them and continue with the other objectives, if they do spend 50 a turn then pray the Germans/Italians do something good.