Poison Bomb on low level monsters?

To clarify:
While its true that those two skills cannot kill the monster by the poison effect alone, they do not work the same. Mist is based on the monsters HP and take a %ual chunk of it each time it strikes while venom is based on the thief's stats regardless of the monsters HP.
Casting mist does some poisonbased damage initially if I'm not misstaken, and that would kill the monsters left with 1 HP if you are circling a map while misting it.

Yeah, i was referring only to the poison effect, not the damage forumula. Poison bomb will also kill 1hp monsters with direct bomb damage.