Board Thread:Questions and Answers/@comment-25349773-20141215160138/@comment-25730832-20141215163322

I don't know how far you are into clearing maps but I'll probably go with 3-2-A grinding (retreat after node A) as I found it to be the safest map (especially if you have at least 2 subs to switch around then the only thing that can ruin your day is their CA). The typical composition was listed in 3-2 Map page so go check that out.

I actually did 3 CA (or any ship I'm lvl-ing), 1-2 CV &/or 1 BB (usually BB if CA lvl too low), 1 SS most of the time. Might be more risky in cost but I was able to lvl 3 at the same time. The switch-aroo was a bit more just in case pre-strike didn't clear enough and we need to fight.

The other well known map: 2-4-A also works.