Not sure if this is a bug or the description for the skill not clear enough. When using a range attack and kill an enemy, the bloodlust does not trigger. However, when I kill an enemy with melee attacks I get bloodlust and if I switch back to a ranged attack, I do get the bonuses. I was trying a new build with the jester bow, so really need that bonus, but having to switch between ranged and melee defeats the purpose