Board Thread:Questions and Answers/@comment-11700680-20170920202000/@comment-26366865-20170920232251

Two 3-2A fleets with 3-4 DDs each + one 1-5 fleet with 6DD/1CL5DD would be the ideal IMO. You can't use the same DDs on any of these fleets, as you need them to actually hit stuff so you don't eat a torpedo every other run; that's why I said 3-2 is morale-dependent.

As for 5-1, you have a ~75% chance to go to the sub node with a DD fleet, and it does provide a lot of xp. However, you'll need to refresh whenever you get sent to node A, which may or may not result in troubles for your account. I never bothered looking into the "excessive refreshing results in a ban" stuff, but if you plan on using this map for training, you'd do well to research it a little so you don't regret it when it's too late.