Strat buildings take 250lbs of damage to destroy, correct? Or is it 500lbs? For bombers to have a good sized effect on the game play, we would need to have the supply facilities fairly close to the front. Even then, the bombers role would be restricted to killing hangers for 15mins, or destroying radar, fuel, troops, or ord at the supply facilities.
IMO, the only way to give bombers a major affect on the game would be to add vehicle and aircraft production facilites for them to hit. And that would turn this into WWIIOL with a better damage model and selecton of planes.
And I bomb nothing of any real tactical value. L'll go level most of a town if we're trying to take the base, or go bomb a field with a stuka or B5N for fun, but thats about it.