Statiscally, if you have 6 bombers at once make a SB, then 5 of them survive.
so: you lose 15 IPC’s
and your opponent loses 5x3,5 is 17,5 IPC’s (that is if his IC has enough IPC’s on the territory)
meaning an average total gain of 0,417 IPC’s per bomber per TURN…
that’s true so far!
when you are superior in such a way that you can afford losing bombers then it is a stategy (but in my opinion not a very good one) 'cause for USA it is a strategy like any other…
USA 1 and USA 2 together is good for a built of 5 bombers, together with the one you have to begin with is 6 bombers to attack in USA 3! that’s an average of 17,5 IPC’s to drain from G in round 4…
it’s not the best way to get USA in the action, I think, but it’s a way to go…
If you can use them in combat in any way, they are far more better!
your bomber has a 4/6 change to inflict an extra casualty…
if my assumption is correct that your attack has enough cannon fodder, so your bomber isn’t in the line of fire, then you lose ZERO IPC’s and your opponent (with lots of infantry, let’s suppose) loses 4/6 x 3 IPC’s = an average of 2 IPC’s per COMBAT ROUND…
so, if your combat lasts 2 or 3 rounds, your bomber has multiplied his use!
I believe SB is a good thing to do with your bombers when you can ABSOLUTELY do nothing else with them!!!
(or in my example: if they would be used as cannon fodder)