I think you take the path or less resistance with the allies, find the weak spot. Normally the allies mount a huge naval force at Gib to force the axis to set up multiple def.
If Italy is beaten down, and the Germans aren’t very strong protecting the under belly, then a southern route through the Med it is (Rome, S France, or Greece). Forcing the Germans to fight more then one front. Plus it would protect Africa/Mid East for the UK.
If the German Baltic navy can’t support the defense of Norway (they haven’t added much to it), then go north. Norway can be a huge swing if Germany is unable to recapture it IMO. Germany loses the NO, the US can take it (build IC), UK can reinforce with troops/AA and RAF, and it is a great base to bomb both German majors from. Normally the Germans will build a dd off Normandy to block you from a US amphib of Norway directly from Gib (would be nice if the Russians have a sub left in the North Sea and/or built a bmr to attempt killing off the blocker). Even if they delay you in sz 110 (which they will), you can add to the allied fleet (more protection) then land in Norway the next turn. This could however give the Germans the extra time to build up defenses, or a counter attack because they now know what your options are.
IMO Norway is more appealing then France, because if you attempt to liberate Paris you need more units and the Germans have that Major IC in W Germany to recapture it (another $ grab). You would probably need to take W Germany to reduce it to a minor, and that could be a tall order. Norway IMO allows the allies more options. It also gives you a base for the RAF to over power the German navy if it isn’t already dead. From there you can also work on the French coast line, or Denmark w/US, and a crippling blow to Berlin w/UK.