Ahh this topic has come up again... sheesh. Typically I try to land any sorties I get with multiple kills, especially if the fight is going downhill (i.e., if either side is hording). If there's good fights to be had, I usually stay in until bingo ammo/fuel or I die. It's kind of a symbolic gesture along the lines of "this is what I would do if I were in the MA", good practice for area-wide SA.
That said, I don't really care about my DA score. I kept track at first to kind of measure my progress, finally breaking 1.0 KD ratio as a huge sign I was getting better. This was useful and important to me for a time, but again mainly as a measure of progress. I never bragged about it, nor did I see any reason to.
Once I got and maintained 1.0 KD easily (90+% with UnPerked planes) and once I actually fought a few bonafide duels in the DA, I started caring about score a lot less. In those duels, you die a lot. You also bail and reup quite often. I've also bailed to save time when nothing was at stake (wanted to get into a fight w/o first landing a plane, etc).
All these things skew the score, which is why I no longer care about it. It no longer measures my progress, and having flown a lot more MA with JG11, I can say that DA score isn't really a good proxy for MA score even without the aforementioned skewing factors. Not saying one is better than the other, the environment is just different.