"A kill" It would have to be between these two:
Several years ago I was rtb in a spit9 on mindano near A44 when a P47 spotted me, and dove in for the attack. I had no ammo, and very little fuel. I repeatedly evaded the P47s BnZ attacks with the E difference becoming more equal each pass. I realized that this guy would never take the hint, and go find an easier target, so I changed tactics to using the terrain as a pick. In other words "Ill present a shot opportunity, but you'll have to auger to connect with it". The result was Sysytem: You have shot down HiTech.
The other was that I was 6K away from an enemy field, and saw the telltail spawn dot indicating that someone was about to spawn at the far end of the runway. So I elevated my nose, to lob a rocket about 1/3 the way down the runway from that spawn (6K range mind you). I watched the dot spawn, start rolling down the runway, and then a crater appeared right behind them dead center on the runway and they blew up. It's the longest range kill from an a/c Ive ever gotten.