So I'm looking at some of the CP slottables, e.g.,

• Occult overload: Whenever you kill an enemy under the effect of a status effect, they violently explode for 2560 Oblivion Damage per stage to all other enemies in a 4 meter radius.
• Siphoning Spells: Restore 300 Magicka per stage, whenever you kill an enemy.

Do these effects trigger only if I land the killing blow on an enemy (the last hit causing them to die - i.e. I directly killed them)?. Or do they trigger if I just damaged them during combat and one of my team members lands the killing blow? Siphoning spells seems really powerful for healers if they just need to contribute to some damage. Occult overload sounds cool for PvP bombing.