There are so many circumstantial penalties when shooting an arrow: -4 from shooting enemies in Melee, -4 from enemies in partial cover, to name a few. If I'm trying to run damage calcs to anticipate the output of my build so I can compare it to a melee build I'm trying to make as well, but I don't know what assumptions I should be making, so I don't know the impact precise shot and improved precise shot will have on my damage.
Currently I'm assuming enemies I target will be in melee/in partial cover 50% of the time, (so instead of -4 from each, I just use -2 from each as a default assumption).
Is this a good assumption or not? How do you guys approach that?