There is none.

It has never been stated by anyone in SpaceTime Studios, and further more why would it matter anyway? just because the percentages are there it doesn't guarantee you the drop you desire each and every time you farm. You have to understand it is rather all random and luck only gives you the chance to reroll into a drop higher on the loot table.

In the end the elixirs and luck items do assist you in what you desire but doesn't guarantee you what you want. You as a player need to think and decide what you want, and what to wear when farming and know which map to get it from, if it is not discontinued.