Actually, my fleets resemble the USA Fleet in WW1. I think our fleet had more BBs & DNs than cruisers in 1917.
The fleet I usually play consist of DNs that range in size from 49 Hull & 49 Armor to 43 Hull & 43 Armor, speed six.
They are escorted by DDs that usually have 10 Hull & 10 Armor, speed eight or nine. Theer are gunboats/PT boats with 4 hull & one armor, speed 11+ to keep the other side off balance.
I have designed a couple of cruisers, but just don't enjoy playing them much so I replace them with DDs. The only time they get used is in small battles. These cruisers have 22 hull & 22 armor, speed seven and CR from 300 to 340.
The CR of the DNs ranges from 700 to 600, and the CR of the DDs is from 150 to 200. Other than the lack of cruisers, I do bring balanced fleets, the number of DDs usually being double the number of DNs I bring, with some of the smaller ones too.
Cheers