In case anybody cares here is the starting naval strength for 8/14. So if you want accuracy you can create ratios of piece and historical number of units
I suggest:
Dreadnought 7.5 to 1
Pre-Dreadnought 7.5 to 1
Battle-cruiser 10 to 1
Armored Cruiser 20 to 1
Protected Cruiser 20 to 1
Other Cruiser 30 to 1
Destroyer 40 to 1
Submarine 25 to 1?
France:
Dreadnought 8
Pre-Dreadnought 14
Battle-cruiser
Armored Cruiser 19
Protected Cruiser 9
Other Cruiser
Destroyer 81
Submarine 70
UK:
Dreadnought 22
Pre-Dreadnought 40
Battle-cruiser 9
Armored Cruiser 34
Protected Cruiser 52
Other Cruiser 35
Destroyer 221
Submarine 73
Italy:
Dreadnought 3
Pre-Dreadnought 7
Battle-cruiser
Armored Cruiser 7
Protected Cruiser 11
Other Cruiser 3
Destroyer 33
Submarine 23
Russia:
Dreadnought
Pre-Dreadnought 10
Battle-cruiser
Armored Cruiser 6
Protected Cruiser 6
Other Cruiser
Destroyer 25
Submarine 22
USA:
Dreadnought 10
Pre-Dreadnought 23
Battle-cruiser
Armored Cruiser 12
Protected Cruiser 22
Other Cruiser
Destroyer 50
Submarine 16
Aus-Hun
Dreadnought 6
Pre-Dreadnought 6
Battle-cruiser
Armored Cruiser 2
Protected Cruiser 3
Other Cruiser
Destroyer 18
Submarine 5
Germany:
Dreadnought 15
Pre-Dreadnought 22
Battle-cruiser 5
Armored Cruiser 7
Protected Cruiser 17
Other Cruiser 16
Destroyer 90
Submarine 31
Ottomans:
Dreadnought
Pre-Dreadnought 2
Battle-cruiser
Armored Cruiser
Protected Cruiser 2
Other Cruiser
Destroyer 8
Submarine
Notes:
German u-boat strength in 1914 never exceeded 34 units ( Dec)
Ottomans got a few battle-cruisers from Germany after the war started
I can post info for Spain and other navies BTW.