If there’s one thing I’ve learned it’s that for allies there are no half measures…
At least playing against equal or stronger opponents
In any case, Japan must be crushed (above all) as well as Italy.
If you aim for a KGF and let Japan rage in the Pacific there is always the risk that with a coup they will be able to take the 6 VC and the game is over… even if the Allies are close to taking Rome or Berlin
Of course if you only tighten up on the Pacific perhaps also using the Russians (right @MrRoboto? :))… you have to be very organized in Europe to avoid Hitler arriving in Cairo (or London)…
Very expert players are able to do this of course… but in my opinion there is always a percentage of risk that the game predicts (like all clashes on A&A) but which you can try to avoid.
And above all the Allies should fight in a more aggressive way (which I have not yet learned to do) but not recklessly… aggressive in the sense of making the Axis risk more than necessary in certain battles (land and naval) because otherwise the the outcome is almost always for the Central Powers of the board.