Quote Originally Posted by Valsacar View Post
Lots of misinformation in here. Bonus damage is pretty simple. It increases any added dmg (your dmg stat) by that percentage. You can test it out with the right set of items. Find an item that adds dmg (but preferably nothing else) and one that adds less dmg (try not to get stats that affect your dmg).

For example, a sorc could buy 2 rings. The +str +3.1 dmg ring (lvl 36) and the +str +1.9 dmg ring (lvl 35). Switch them and you'll see that your dmg doesn't change by 1.2 but by a much larger number. Do the math with your bonus dmg stat, and you'll see it works out to be what you observed.
I was always told that bonus dmg pertained to crit dmg but your answer makes a lot more sense. Thanks for clarifying this.