well, any engagement with the japanese fleet in the pacific will usually result in a loss unless you bushwhack an unsupported transport fleet or or a couple of subs.
Besides, you'll need as many ships to defend the homeland.
On another note, the combined UK/Free French/Dutch/Australian etc....fleet kinda ran away to protect australia. It wasnt until the US got into action that they evern considered offensive operations. Even with the losses suffered at Midway, the Japanese fleet was still superior. But by then, their superiority was circumvented by Carriers....which sadly is not the case in HOI...which is more akin to 19th century naval engagements then 20th century Carrier warfare.......
In most cases, I would withdraw all my fleets to UK and wait for the yanks. On an offensive side of things..i'll only poke my head out once im sure the UK isle is secure, that means a couple of years building Med subs and DDs to supplement my supaglued 350mm pre-war dreadnoughts.....