A Deadeye is extremely skilled with the bow, and can utilize it to damage single targets or even small groups.
Here is a brief rundown of the Deadeye skills:
Puncture: A magically imbued arrow attack that can travel through enemies, and damaging everyone in its' path.
Exploit Weakness: A debuffing attack that greatly reduces a target's arrow protection.
Explosive Arrow: An explosive arrow attack that will damage everyone around the area of impact.
Trueshot: A very powerful arrow shot, that offers extreme speed, accuracy and damage. An arrow shot with Trueshot will travel in a completely straight line, with no arc.
Salvo (Ultimate): A devastating barrage of arrows fall from the sky towards the Salvo's point of impact. Everyone affected by Salvo's deadly rain will suffer serious damage and will be unable to sprint for a short duration.
The video follows: ignore the health-mana-stamina bar appearance in this video. This is from a test client with this specific configuration.