I'll have to try that one out!

any 4 unique=1 random unique

Ingredients
Result
3 x potions of the same properties = Upgraded version of the potion
3 x Big health potion = Giant health potion
2 x gems and weapon without sockets = socketable weapon
4 x Unique Item = 1 New Random Unique Item from avg levels of the 4 unique items
2 x set items = 1 random set item from avg levels of the 2 set items
2 x spell scrolls = 1 random spell scroll
3 x Set Item = 1 New Random Set Item
2 x Common Set Items = Unique Set amulet
3 x gems/socketables of same level = 1 random gem of same level
2 x Spells = 1 random spell

can you be more clear with 2x common set items = unique set amulet

sets begins with rare then unique. so do we put 2 rare set items to make 1 unique amulet? this doesnt make sense because 2 rare set = 1 random rare set.

I think he just means its a unique with a set affix also. I've seen em.