I think you are streching the definition of a destroyer beyond the breaking point here. Armour, 6in guns, 4in secondaries...
Sounds very much like a small light cruiser to me.
And I doubt you're going to get 42kts out of them, no matter what you do.
That's why people like you come in, I'm not an expert, but try to make it as good as I can. Then you/others just say what I have to fix.
I think I should maybe go down to 2in instead of 4in.
Speed: maybe a little fast for its time!
Rhade You're absolutely right in that. I should maybe write it in mind that not everyone who understands that a battleship carries escort vessels with them. I thought everyone knew that.
such as "G 334" it fooled a battleship into a minefield, it's of course also destroyer-escort for her too but the main goal of any strength, and something that will look good in the papers of any captain is that they managed to destroy a larger vessel.