Updated the first post, new attempt. This is not so much about the superstructure (or currently, the lack thereof) so much as gun placement/amounts and armor belt. I ran it through SpringSharp and it came up as undergunned, so I might add a couple of 4inch mounts. Of course that could also be because I entered it wrong.
I'll be spamming more 20mm cannons and maybe a few more twin 40mm.