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AvAra in other thread you show that you have old source code of the game in c++, probably if you search on that old code for the item ID you will see how server add those extras, as I remember the extras depends on:
Item must be RARE
Item must be Crystal or Datu
Item must be for Amara+
and I don't remember if the item ID is in a switch (meaning that only those item ID on the switch will have those extras you show)
the other extras (you are not asking for) that server gives on items when you use 3,4,5,6,7 pcs of the set can be configure on the SETITEM tab on HTSSettings(server side), and tantraparam(client side for the display)
And BTW the extras you asking for, starts from +12