A larger DL or small CL

I want to design a large DL or small CL to act as a leader for my 2400 ton destroyers. I have been toying with a design that has 10-5.1in/50 guns in five twin turrets (three forward, two aft). I started with dimensions of 405ft x 41ft x 13ft, but all that will carry, reasonably, is 8-5.1in/50 guns. I could probably make it 9-5.1in/50 guns, but I suspect that triple turrets would be problematic for DP guns on a small vessel. My current thinking is something like 439ft x 43ft x 13.5ft.