I find that people oftenly advocate that either US or UK should get Norway.
But I find it more advantageous if Russia can get Norway instead.
UK claims LEN on UK2 or UK3. Then on RUSSIA3 or RUSSIA4, Russia blitzes a tank WRU-LEN-NWY, and claims it.
Of course it only works if Germany empties NWY on G1-G2, but I find that they oftenly do so anyway.
I was actually just going to mention russia as a good alternative to own Norway. However, im not sure what your suggesting, as germany probably isnt swapping norway if their fleet is dead in sz 5, and Uk is landing in Karelia. But i guess if germans stack in karelia and/or you leave their baltic fleet alive, they can swap. But I like UK can opening karelia for russia to blitz a tank. Baltic fleet must be dead for that option.
As for a norway IC. For one, Is it useful pumping US tanks? I think id be building alot of infantry there as well. A stack of tanks can’t do a whole lot by itself, except increase the threat on dead zones. I like 2 Trans much better than an IC, anyway. As flexibility is the key to turtling germany. My prefered route with allies lately is a triple threat TWICE!! I secure sz5 for the British, and I like 5 tranports min. I can now threaten WE, GERMANY, and EE with 5 trans of units from the North. Now I have the USA having 8 -10 trans shuck in africa, with the tail end of the shuck in the med. Now I can threaten WE, SE, and BALKANS in the south the 4 -5 trans of US gear. When germany is facing that much pressure threatening 5 territoires in europe, due to the flexibilty of the allied shucking systems in both the north and the south, they are pretty much rendered ineffective in pushing toward moscow.