I have a km ss4 I use 2 torps, 1 planesman,1 sonarmen, the rest engies and i rotate 2 gunners on now and then. Id recommend getting the km PCA Molke for fast lvling also helps if u got aa gunners at least for ss1 to ss3
If you got the $$ buy elites and boost them all, people will say other wise but they just dont want to get owned. Have funn brah