When I read the logs, if the bomber pilot only loses his drones, those losses do not show for his stats (only for the person who killed the drones). If the CM's assumed that for every time a bomber pilot is shot down it was actually 3 aircraft that were lost, that would fill the gaps.
Otherwise we have a huge gaping hole in scoring these events.
You can't make that assumption, though.
You have no idea if a person launches 1 or 3 aircraft.
If a person is shot down and then shows as having landed successfully later, you can make that assumption ( at least one of the drones was shot down ).
If a plane is shot down after the person doing the damage is killed, it doesn't show as a kill in the logs either.
With the data available, today, the best is done with a reasonable amount of effort.
You might be able to get a little more accurate with the actual figures, but the amount of work tracking 100 - 200 bomber pilots is freakin' immense.
Been there.. tried that.
You don't want to make any VOLUNTEER go through that.
Trust me.