Try a value of 5 instead of 50.
Just curious, why are you trying to use area with such a short ranged system? Final would much more effective all things considered.
Simple, most of the missiles I run into fly at 25,000m/s or less. So I fire at 50,000 meters, again at 25,000 meters, and again point blank in that last 5 seconds.
Why fire once when I can fire 3 times?
For extra point blank fire I still have CIWS.
I also detect the missiles at really long range so by the missiles enter PD range I usually have a really high tracking bonus. I will tell you more about it next combat I get into and get you more exact numbers.