Utilizing this function will give all donators HUGE advantage over non donators, for instance :
I personally firstly collected Black dragon set +13+dd+l, but making it +15, and find its items is pain
then I moved to brass set and collected brass dd ref L +13, for like 1.5 weeks, now only 2 parts left +13(rest 15),
If u do set bonus, the ones who donate will just craft ON web any higher tier set with bons to +15, and will literally humiliate all the ones who don't use bons
Its very hard to find ,and make higher tier set +dd+ref+l, to at least 13 (My black dragon i did for few month only have 3 items dd ref+13)
about harmony's on Be sets, that will impact balance and will cause mess, if u want huge dmg u go be, if u want more def and so on u go Ex set+dd
Mattoni