What is the capability of this plane? What range do the PL12/SD10 have? And how high to climb, what range to start firing, what radar mode to use etc.
Cant comment directly on the JF-17 as I dont have it, but as it has a radar, it will have at least the basic ranging if not also LSZ data.
So read this guide
as the radar will tell you when a missile is in range and when is best to fire. Though as a general rule of thumb for most Fox-3 missiles, within 15-20km usually a safe bet, unless the target is doing something really dumb, like space climbing, then you can fire from further away
Mainly base bomber, then go for enemy planes
I usually do less than 37km, 10km ideally