I know you get a +X% Damage Bonus, and X = your Killer Effect, which you get from traits and can furtherly pump up with merits and gear.
What I'm wondering is if that damage boost applies to everything or only against the selected targets.
For example let's say I get +15% Killer Effect against Amorph.
Does that convert into +15% damage AGAINST AMORPH or 15% damage against everything?