Maybe I am the only one who noticed this but;
I have done a single sortie in a Mossie bomber and dropped one cookie on a town centre and got afround 167,000 for one town centre having filled the screen.
Then I do the same thing again but bomb 4 town centres re arming 4x but only get about 270,000 damage points.
Then I bomb 4 town centres in a row in a B29 with 4K bombs in one sortie and get about 600,000 points for that.
Now the Mossie 4 sorite with re arms looked to do more damage than the B29 run overall but yielded less than half the points