I find the concentrated bomber strategy very interesting as an approach for the US, for the reasons outlined here - the cost of getting US infantry into the action is incredibly high, so much so that Air power compares much better vs. land forces for the US than for other nations.
How many bombers is too many? I was picturing maybe 2 US bombers on US1, but for the purposes of strategic bombing, the early IPCs denied will be magnified throughout the game, so perhaps a US1 buy of 3 bombers makes sense?
Unless Japan was posturing in range of a US attack, I imagine I would build the bombers in western US and then send them directly to the UK for use in SBRs vs. Germany (or sinking/deterring a German fleet). Would you agree?