I own this as well, and with germany I created a naval super power once:
5 SH Battleships (Berlin, Dresden, Bitburg, Hamburg and Munich) Account for 8 Capital kills, 3 of which being carriers (all British) and 3 BB's, and 2 Heavy cruisers.
4 Battleships (Bismark, Tirpitz, Freidriech der Grobe, Erich Raeder) All ships combined account for 9 capital kills ( 2 carriers, 2 BB's, a BC (Dunkerque), and 4 heavy cruisers.
9 Battlecruisers (Scharnhorst being my top killer in the entire navy, with 4 Capital ships and 9 escorts claimed to its name
6 Heavy Cruisers (Use as support to the SH BB)
21 Light Cruisers (7 have sunk so far, but i rebuild a ship in its place as soon as I lose one)
15 Destroyers (4 of which i"ve lost, but rebuilt)
16 U-boats (XXI class mostly, with a few VII class as well, I have electric torpedo's researched)

4 Transports (for ferrying around those important marines for naval landings)
I also researched all infantry techs to 1942 by 1938 and pretty much rolled over poland in a few days, and let the italians break the southern line of france, where I then made my move. My navy now rolls almost unoposed through the channel and the coast of england, with minimal air attacks.
I also allied Hungary with myself early so taking Poland was easier, but before poland surrendered, Romania was inducted into the allies, and the hungarians were having some issues, so i sent 2 corps to assist. The line is pretty much holding now at the romanian city of cluj, as the british and some remaining french have reinforced the romanian line there. I am attenpting to get Bulgari into the axis but my threat level is barely making them move. Declaring war agaist the soviets is suicide at the moment so i won't bother, but all in all that was a fun game. I halted it in mid 1944 where it was almost unplayable due to lag.