anti item grind option

[chrcoluk]

I notice there is options to reduce CP grind.

I have been for 3 hours trying to get 10 scarletite from vikings on chapter 9. (rare drop). In those 3 hours I have 3 of them. Kind of like a trap grind.

Could it be possible to add an option that does this.

common drops on "every" enemy become 67.5%. or 100% (67.5% is so catalog's still have a purpose).
rare drops on "every" enemy become 10% base chance.