The heavies typically flown in the MA can put at least 3 gun turrets on you from almost every direction. Pardon me if I think it would be fairer if attacking a buff formation were equivalent to hoing an A-20, instead of equivalent to hoing 3 A-20s.
I have already pointed out the factors that make it typically impossible to set up multiple passes properly in suffecient time to stop the buffs from accomplishing their mission, which is the whole point of going after buffs in the first places. If the fighters could intercept the buffs 100 miles from target instead of 10, things would be different, but such is not the case in the MA.
So you want the game configured in such a way that you,
by yourself, can detect a bomber formation with sufficient time to take off in a plane that is particularly adept at killing bombers, climb to a reasonable attacking altitude, and have enough time to make enough attacking runs that
you can kill them all before they reach their target?
And how many passes would you like? 3...4? 5 if your plane only has .50s?
Like Angus said.. multiple fighters is the answer.
As some point Krusty will show up and paste in his argument that bombers are too fast ( I outrun his 262 in B24s ) and, as painful as it is, I will agree that there might be a discrepancy there. However, bombers are still too vulnerable to be killed when attacked by more than 1 at a time.