
I will start with some examples:
Power shot - The bow user pulls his bow strings more powerfull than usual, thus making the impact a way deeper.
Dual shot - Shooting two arrows can be handed by ranger, but since he does that at the same time he can't put very good hold on them both with one hand, thus they strike a little less acurate.
Distracting shot - The ranger can do one very quick shot targeting non lethal zone but quite painfull or disbalancing stopping foe's action. Since he targets on the spot and hitting different zones depends on the skill the enemy use, the pain the ranger inflict can delay the usage of that skill for some time.
Poing blank shot - Like the powershot, the close shot is more powerfull since the ranger puts an effort in it, but since he shots without much targeting the range is reduced. Using power pulling of the string is more easily recovarable that way (with less targeting effort) so the ranger can shot poing blank shots more fast than than powershots.
Precise shot - The ranger calculates enemy's movement, stances and steps. With this prediction he cannot miss due enemy defensive actions, but any sort of distractions can scatter ranger's focus and he will miss.
Punishing shot - This skill is hard to master and sustain, so the ranger can only hold one such in a mission. This combines the power a heavy shooting with the fast strike of the distracting shot, and it's only drawback is the less pain that remains thus enemy can recover normaly. This skill is quite difficult so the ranger needs more time to prepare another.
Savage shot - This is the more native version of powershot. The ranger shoots at very vital points that are very easy to defend, except you have your hands bussy with spellcasting - that is when this shot will be devastating. Since it is quite a heavy, even when not casting a spell the foe is interrupted from the impact.