If our Provisioning is maxed out and our Hireling is at 3/3 then we should be guaranteed to get either Frost Mirriam or Bervez Juice. The time between my the last two times I received ether of those was days, which is ridiculous since I have all those skill points towards my Provisioning skill line.
With 8 chars at provisioning 50 and 3/3 hirelings, i'm getting more purple mats that i can possibly use up ...