Recipe DropList Accuracy?

I've done Zak twice a day since the patch and haven't found more than some junky potion recipes.

I've been hunting Dark Angelic Blessing rings from Chief Memory Guardians, for 5 days straight with 2x drop, no luck. It must be very rare, and I've even found all of the recipes drops from Chief Memories except the DAR recipe... kinda tired of grinding it already and losing my faith because of all those WH hackers grinding them also (obviously they're hacking which have more chances of finding) -_-