diablo-3
I recently thought of buying a Cain's Fate set to level up faster. In the game and on Battle.Net website it says:
Does equipping the whole set(4 items) give any more bonuses?
As of the 1.04 patch on 8/21/2012, each party member gets their own magic find and gold find value applied to the items that drop for them.
Prior to 1.04, magic find in a party was averaged between party members. So if you had a 4 person party, one had 40%, one had 20%, and the other two had none, everyone would have an effective magic find of 15% for their own drops.
The same thing applies to gold find bonuses and bonuses to XP.
For single player with a follower, you get your own value, plus 20% of the bonuses on your follower's gear.
You cannot gain set bonuses for wearing 2 of the same set item because you would be unable to equip them. Set items are unique equipped as shown in the picture. You are unable to equip two of the same one.
Best Answer
Unless the bonus is identified on the items, no. In your example, putting on four pieces of Cain's Fate would not give you an additional bonus over putting on three pieces.
If, for example, you picked up a set that had bonuses for 4 or 5 pieces, then these sets would give additional bonuses as detailed on the items for equipping more pieces of the set.