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Description
A common mistake even for proficient archers is to be overly confident in the power of his own arrow so that he steps out of the line in his supporting role. He would then get in the way of the other warriors' battle to death and snatch away their accomplishment. The Support Shot skill allows for the wisdom and discernment to use the bow with the whole battle scene in mind rather than the archer's target. The Support Shot skill is an integral part in the way of a respected archer.

Details
Can be used while your teammate is attacking a monster without interrupting the teammate's attack rhythm.
Although the skill description makes the above statement, the skill works best on enemies that are knocked down because unlike normal arrow shots it won't cause the mob to get up quickly. PROVED WRONG
Uses 1 stamina.
If used by an Elf, only one arrow will be shot rather than two.
The Elf will also be slowed to a walk, as if using Magnum Shot.
Aiming speed is 130% of a normal shot.
Range is 90% of a normal shot.
Damage is 80% of a normal shot.
Load Time is 0.8 seconds
Support Shot is bugged, and does not serve its main purpose. As such, it is most used as a quicker-aimed, lower-powered Ranged Attack substitute.
However, it can be used to shoot enemies that another is using Final Hit on without knocking them away.

Obtaining the Skill
Talk to Trefor about skills.
The player must have first learned the Ranged Attack skill; Practice Rank is still acceptable.
The Skill is immediately set to Rank F upon learning the skill.

Support Shot has been rebalanced.

http://wiki.mabinogiworld.com/index.php?title=Support_Shot

some minor error at the summary: rank 5-4 use 5 stamina, rank 3-2 use 6 stamina.

This skill pretty much better than 2 people try to smash 1 monster (unless they have level 2+ natural shield), A person smash and B person have to wait till they can do smash again.
This give risk of monster will have instant recovery and attack the player when smashing, or monster may attack A person when s/he try to smash if monster is running to attack the B person.
Support shot is act as stun and boost malee damage give chance for smasher to do smash without fail.

sample: Person A have 300 max attack while Person B have 100 max attack so why not let Person B use support shot boost Person A who can do great damage.

sample pic sad too large)
Support Shot damage boost