How does World of Warcraft 7.3 improve the single output of shooting hunters?

After playing for a few days, afk has been playing for a long time, and now I forget it. Let's talk about it. Damage bonus is mainly aimed at shooting. Multiple shots or arcane shots have a chance to mark monsters. There is a red arrow overhead, which will 100% trigger the shooting of the mark. Marker shooting will give monsters a vulnerable benefit. This debuff is the countdown, giving the aiming shooting time. Aiming at shooting damage 150%, which may trigger instant firing. Tier 1 talent can change the aiming unit into group A.