129% is a pretty weird number
yes, the base is 75%, so you're supposed to have 75%base *x +17% returned dmg , where x is your bonus from items/ability. So, in this case, 129 = 75x + int/2 -> x = 1.5 , meaning 50% from item's bonus... i can think of destroyer level 3(50%), just my guess. am i right? I have too the 1.65 installed (manual referred to 1.64, but i don't think they had any reason to change this), but i can't verify, cause too much snow to go back home
i miss my pc so much!! hope to be helpful, let me know