KJ, quite a few stay high, attack and run. You're asking how to stay alive and get kills, and mostly quite a few guys who do that fly in a style some would define as "timid". Things you also need to look at is kills/hour and kills/sortie. I used to fly this way a lot, but I have since changed my ways in this area, and will mostly engage anything, unless I'm seriously outnumbered because if its more than a 2 or 3 on 1, I know I can't win at the level I play at currently.
I think it depends what you fly. I learned a lot from watching films of leviathn in a furball. Take shots at those planes you know you can hit, and don't commit to chasing someone around who is faster than you, keep your SA up and fly defensively till someone makes a mistake. If you are in a furball, most newer guys will go for shots they can't hit causing them to overshoot which could give you a good shot.
Know what your plane can do and what your strengths are. If you are in a zeke you don't want to be fast, if you are in a tempest you don't want to be slow. The way I improved was I would fly into areas where our team had numbers, and take on some guys with an advantage on my side. Then as I got better shooting them down I would move to areas where I didn't have the advantage and see how I did there.
But if you really want to up your K/D, get a fast plane, stay high, don't come down and BnZ people till they do something stupid and you got um. You get 3 in the bag, RTB, land, and do it over again. Once you string a few of those together your K/D will go up. And don't get into situations where you are outnumbered and low.