Can only test rank 1 and 2, don't have 3 and 4 (if someone could test those pls)
This spell data says this spell adds proc Kiss of Life. After doing some testing(noob vendor weapon & no buffs), when the buff is applied, you get the message "You feel flush with stolen life." and can see it healing me via the heal crits, however it is not doing any dmg to the target.
Regards,
Sticky