Talk:List of submarines by upgraded maximum stats/@comment-24269960-20131215090617/@comment-24254431-20131217050311

Depending on what you're doing, you probably either want 2x turbine or 2x torpedo. If you're lacking in hull-mount/quintuple torpedoes and not doing any night battles, 2x midget sub make a decent replacement (better than quad oxygen torpedoes for day-only).