That still wouldn’t be enough. He regard Slavs as “untermenschen” so I don’t know if he would made use of his biggest source of manpower.
And the navies of Germany, its allies and its conquests, still would not have had parity with the USN. You needed the Japanese and their naval aviation - and they were half the world away!
Only when it was convenient....Slovaks were Slavs, just like Poles and Russians, but the difference was, Tiso and the Slovaks cooperated with Nazi Germany, so they were left alone.