This came up awhile ago in my LS and we were arguing about it for a good while, and I was talking to someone about it tonight and we still couldn't quite come to an agreement.
If you stack dmg reduc gear. Lets say earth staff Arh+1 body and arh head+1 (which brings your total to -35%) Furthermore for the sake of making this easy lets say you consistantly get hit for 100 dmg) does the 35% all get stacked so it becomes 65 dmg every hit? or does like earth staff dmg get reduced first then arhats body then head or what?