Guild Wars 2

I couldn’t really find this anywhere on the wiki.

Does anyone know how Damage Reducers (via traits or Frost Aura/Protection) interact with each other and ultimately Rite of The Great Dwarf?

e.g. does RotGD, Protection and Frost Aura provide 90% Damage Reduction or 68.5% (50% * 30% * 10%).

I need to know for science.

I don’t think they stack, I think it’ll just take the highest percentage modifier you have currently active (in this case, it’ll always be ROTGD), I could be wrong though, but this is how I see it working.

protection and rite seemed to stack, but I can be wrong since the duration is so short.
I think that all the effects you mentioned are separate modifiers, so they should stack.

It should all stack multiplicatively. Otherwise 100% damage reduction would be possible with either a Mesmer or a Tempest (40% protection or 50% on Phantasmal Defender)