If you cube Leorics Crown, you still need a ruby (preferably highest quality) in your head slot but your helmet can be anything.
Leorics crown would best be cubed anyway (but for some reason it is not listed in Kanai's Cube on diablofans?). If the items are not lowlevel enough (especially Leorics Signet & Leorics Crown), you can remove the level cap with a lvl 25 gem of easing (and the item) in the cube. Reduces the number of items needed for set bonuses by 1 (to a minimum of 2).
