X-Wing Dice Statistics

This is an app any beginner or veteran player of Star Wars: X-Wing Miniatures Game needs to add to his arsenal for state-of-the-art decision making. Should you attack that TIE Fighter having an agility of 3 while having a bonus attack dice because you are at range 1? Would it be better to attack that TIE Bomber having an agility of 2 and a focus token at range 2?