Originally Posted by FriendlyFacez

It now occurs to me that I don’t really have a firm idea what to try to accomplish next once I evolve and rank up my four squads. At least I won’t have to waste more gems on 11-rolls. But then, what are gems good for? Random stamina refills?

Four!? I'd try 8 or more. Whaleship requires 16 girls of a given type and 24 of any other type. Four different types of whaleship implies you'll want 4*16 = 64 girls.