Talk:Tutorial: FAQ/@comment-25189003-20140902122830/@comment-24971803-20140902123725

37/38 are good if you have decent leveled destroyers and loads of barrels, and 18 is good when you're going to sleep.

You can run 4-2 because you'll definitely get steel, as well as attempt to clear the World 4 sortie quest. Seems like it drops a lot of heavy cruisers and battleships as well, so you can scrap those for even more steel.

Hope that helps!