User blog comment:FlammeumDraco333/Tales From the Not so Blocky Seas/@comment-26482266-20160207210429/@comment-27822411-20160207231507

There is just one problem however:

It can only be done by Axis (German, Italian and Japanese) ships. If you are not one of these nations, then you cannot do this mission. But I will agree that of the levels, this is the best for the mid level grinders. Close second is the 3rd level, unless you run up against the Nelson class, then you are really screwed.

For the allies, the best grinding mission is actually the first British mission, once you get a high level cruiser, like the Baltimore, or a mid tier BB, like the New York and even the IM (yes, this is the level I used to grind the IM into a Stalingrad). Not that much more difficult than the first Russian mission, and gives a lot more rewards. Just beware the submarines.

The first Russian mission is actually not that hard once you get a Baltimore, but the rewards are quite low. I would be very comfortable adding in a Kawachi or Kongo 1914 in just to add a little more challenge.