Ironically, I think the convoy raiding works better AGAINST the axis, than it does for it.
Just look at the way the convoy zones are setup. Russia has no convoy zones that can be effected, save Sz125, which is in range of British Air and instant naval builds. I mean, why isn`t it the Sz off of Karelia in the north? Or in the Baltic?
The U.S. convoy zones basically can`t be touched.
The U.K. zones are on the FAR side of england, whilst the Axis ones are exposed in France and Norway.
The Mediterranean is also Ripe with Convoys, many having double effect IE -2 for Italy, and -2 for Germany. It
s painful.
Let`s not talk about the Sea of Japan…
And the fact that the Axis doesn`t want to be building destroyers, whilst the allies are going to build them anyways.