What Lusche said. You can single handedly have a big effect on a furball just by holding up the stream of incoming fighters at their base for 5-10min.
That brings up some fun memories.
One time I was able to save a totally capped base. Not by shooting anyone down (fighters aware of your presents are no easy targets) but by flying low and slowing down just enough that they got the impression they could catch me - and most of them (about 10-12) indeed followed me, allowing my countrymen to up and break the cap and get the M3's at town, while I felt like the Pied Pieper of Hamelin

No better thing working for you than the enemy's greed
One or two kills at most but I almost laughed my butt off...