It all depends on what you're going for, my standard layout is alternating metal and alloy which isn't optimal although you have very good buoyancy. I like to include one layer of some type of slope (usually wood for EMP protection) with the slope facing inwards. I use a relatively light layout because I don't usually have space for huge air pockets in my builds. I'd suggest borderwise's videos on armor for more information. I'll warn you that I normally nerf my armor to make it more balanced.

What is a good armor layout?

Oh that makes sense

It definitely is closer to cruiser size and price although the functionality is more of that of a destroyer. The reference for it was the farragut class destroyers which were similarly sized to it.

If anyone else has any opinions, please tell me as I'd be happy to change this if more people think it should be.

Really like the look of this ship. But I think you should call a cruiser