With bombers at 12 and subs at 6, as the US player, I will likely buy one bomber and two subs for use in the Pacific, and buy a tech roll. Once I get it, I roll on the Air/Naval chart. The likelihood is 4 out of 6 that I will get a useful tech, as information is now available. Heavy Bombers and Long-Range Aircraft boost bomber ability, Shipyards and Super Subs boost my shipbuilding, including subs (making 2 subs cost the same as one fighter), while Super Subs make my subs more lethal against the Japanese Navy. With transports no longer being able to be used as fodder, and having no defenses, so continually requiring escorts, I am not going to worry about a Strategic Bombing Campaign against Japan, but concentrate on killing Japanese transports and their escorts. Kill Japan first becomes a lot easier. I would not complain even with Jets, as that boosts my defense in China once I can get fighters there. Assuming that the best tech for the US is Heavy Bomber is focusing too much on one thing. Shipyards in conjunction with Super Subs is likely just as deadly to Japan as Heavy Bombers.
As for a Strategic Bombiing Campaign against Germany, if Germany builds a second Industrial Center, I would shift from attacking the IC directly, to using bombers to kill as many German units as possible every turn. Now, if the British use a tech roll on the Air/Naval Chart, their best are Heavy Bomber, Jets, And Rockets. Rockets, in conjunction with bombers, given the new SBR rules will be very effective at reducing Germany’s output without a second IC. Long-Range Aircraft help in getting planes to the Mid-East, and Shipyards buys cheaper escorts for use on the German subs. With the cheaper bombers, Britain should be able to devote one bomber to killing U-boats in conjunction with the British destroyers. The tech that does not help Britain that much is Super Subs. However, a steady Rocket barrage from the UK, given the new damage rules of ICs, could be just as effective as having the Heavy Bomber tech. One Rocket and one bomber on a SBR have the same effects as the Heavy Bomber tech. With damage accumulating, the German player will need to keep repairing the German IC.