Question about Rune Set bonuses...
Bump.
No one knows the answer to this?
o.Q
My understanding, which seems to be backed up by the wiki article on upgrade components, is that they stack. So if you had five on your armour it would give you the sum of those bonuses, not just the singular highest values.
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When you put the first one on you get 10% MF, when you put the second on you get 15 power, when you put the third on you get an additional 15 MF.
So overall a full set of 6 will give you 50 MF, 50 Power and 5% drake when hit.
BTW if your trying to max magic find you want 5 Superior of the Traveler and 1 Superior of the Pirate. Noble would work too as long as it is 5 of one type and 1 of another.
You can test this yourself with 3 Major runes that give a stat Power, Precision, Toughness, or Vitality on the #1 and #3 piece. Check your Stat, put on first piece, check your stats, put on 2nd and 3rd piece, check your stats.