Granted not everyone has the option on hand. But after a few runs and no weapon from either primal i decided rather than waste a day doing repeat runs and potentially not getting anything, i ran cm instead and got the tome items needed to just make the HQ 2 star ALC weapon which was actually really nice.

On one hand it was sad to replace it so quickly with relic but i still think i potentially saved myself time running primals over and over and over.....