Blood mist is listed as a dashing skill. Since it does damage instantly with the damage/heal AOE it should proc the sets that work with that: Tormentors, unleashed, rushing agony, etc. But it doesn't. Is this intentional or a bug?
Tormentor says that the skill has to deliver a direct damage impact. Blood Mist doesn't have a direct damage component, it's a DoT that starts on landing. If you have floating damage numbers, darker numbers are DoTs.