At first I couldn’t believe that nobody picked Heavy Bombers. Then I remembered that in the Europe 40 rulebook they changed Heavy Bombers to where you roll 2 dice and pick the best result so you still only get one hit. WHAT A CROCK!! That sounds more like smart bombs to me. Basically you are getting a better chance of hitting the target by rolling 2 dice instead of 1. As far as I’m concerned, Heavy Bombers carry a bigger bomb load so they destroy more stuff.
I DO NOT use the new 1940 rule for Heavy Bombers. In my games, if you get Heavy Bombers then you get to roll 2 dice and get 2 hits (assuming both dice came up 4 or less). In the case of Strategic Bombing, you can now inflict up to 12 damage points on an IC rather than up to 6. I guess that is my house rule.
With that in mind, I think Heavy Bombers is the best tech for USA and maybe Germany too. Although Super Subs would probably be even better for Germany.
USSR = Advanced Artillery or Improved Mechs
UK = Radar, Improved Shipyards
USA = Heavy Bombers, Long Range Aircraft
ANZAC = Increased Factory
Germany = Super Subs, Improved Mechs, possibly Heavy Bombers
Japan = Long Range Aircraft
Italy = Improved Shipyards, War Bonds