Do damage reduction debuffs stack?

[LeOsTyLe]

Somebody in this thread said, that only the strongest slow effect work and the other dont stack. So when i have
30% debuff attack speed and 50%, only the 50% work? I ask because in D2 it stack, when its from the same source.

[HardRock]

So when i have 30% debuff attack speed and 50%, only the 50% work?

I can't say whether that's true for attack speed or not, but it's definitely true for movement speed. An enemy can be affected by two slowing effects, but only the most powerful movement speed reduction will apply. When that expires the weaker one will take its place if it's still active.

Although I don't know how slow and chill effects work together or even if there's a difference between the two.

[Sooru]

Allowing only one debuff to work would kind of piss on a lot of solo tank builds, no?. Just insert a penalty for stacking DR sources from multiple players and call it a night.

Do you mean that playing several solo tanks builds in same group wouldn't work very well? I have no problem with that