QA, core, orfen, zaken etc. = you dont get raid curse if you hit them with high lvl character (I am not sure if they changed it after CT1)
In order to get the drops the person that makes the most damage must be of near lvl with the boss. So if the 80 lvl destro does 49% dmg another low lvl must do 49%+ , but not 2 low level chars combined.