Quote Originally Posted by remanz View Post
Ok reduce incoming heals by 30k over the entire attacking period 10 seconds is different from flat out reduce incoming heal 30k by 1 shot. Say I got MS on you, reduce healing by 10%. And in 10 seconds, the healer pumps out 300k (made up number), the effect is the same. You negate 30k healing in both cases. The difference here being, the more healing you get, the bigger the effect for 10% MS debuff. and 30k from NS stays flat.

So at the end of the day, it is just a MS like 10% healing debuff. having more DK only makes sure the debuff will stay on 100% of the time.
As of right now it stacks, i tested it on beta. There are 4 separate debuffs. It is 30k with the 4, it is 7.5k alone.