Apply tranquilizer to your victim until they fall asleep. Sleeping victims cannot act and take damage when they wake up.
Sleep Dagger
Throw a dagger that damages and sleeps the target. Sleeping targets wake up shortly after being damaged. Throwing a Dagger does not break your invisibility. Sleep Dagger does not interrupt enemies' channeling abilities.
Fixation
Shooting a target increases your bullet damage on that target. Gain one stack per bullet hit, two if the hit is a headshot.
Smoke Bomb
Fade out of sight, becoming invisible and gaining sprint speed. Attacking removes invisibility. Close enemies can see through your invisibility.