Talk:World 2/@comment-25994826-20150119004849/@comment-25832576-20150119065935

People generally don't focus on levelling subs; they just tend to soak exp/level up over time when brought as tanks when grinding nodes filled with mainly DD/CL such as 2-4A or 3-2A. Or when running 2-3 later on when you have several subs, so that you can actually make a profit off doing the daily quests (subs are very cheap to deploy).

One sub is good enough for tanking, it doesn't matter how much of a beating she takes since you're only doing the one battle, and can repair her before heading out again (they also repair real quick). Unless you really need to level 6 heavy ships at once, I would advise bringing her along so that only the CAs can damage your larger ships, thus reducing the repairs needed.

I just remembered about this page, you might want to check it out/bookmark it as it contains a bunch of useful information for newer players.