Guild Wars 2

Deadly Arts:

Improvisation – Stealing recharges the cooldown of all skills based on which stat you have traited into the most (trickery-tricks, shadow arts-deception, acrobatics-traps)

Critical Strikes:

Hidden Killer – +25% chance to critical hit while in stealth (guaranteed 100% is op for backstab builds)

Shadow Arts:

Slowed Pulse – bleed damage is reduced by 50% if you have 5 or more stacks of bleed

Power Shots – Increase Short Bow and Harpoon Gun range by 300

Acrobatics:

Descent of Shadows – release blinding powder after landing from a jump or fall

Vigorous Recovery – gain vigor when health is added to your life points (different from using healing skills)

Assassin’s Retreat – Gain stealth for 2 seconds each time you kill a foe.

Trickery:

Ricochet – changed to Armor Piercing Ammunition: Pistol attacks now pierce your foes.

Hidden killer’s 100% bonus is actually not that useful. If you’re running a backstab build you probably have very high crit % already and are better off taking Executioner.