On the 88 i have flown with 3 still on probation with 0 PIC. Spent between 3-5 years at the regionals. The quals needed appear to be all over the place.
I have also flown with people that had been at the regionals for a couple of years and minimal pic. Others that had been at the regionals for 20 plus, military with 8 years and retired military. I don’t think that there is a min or max number. I have no clue what the hiring committee looks for. Make sure your app is updated and it has been professionally reviewed.