My experience here has been that between 75% and about 35% if your SFO, LAX, and likely EWR based, you will get higher credit lines with less productive trips and thus min days off. You won’t be able to drop because they are always below coverage. May occasionally get a better trade but need to get better seniority over time. I’d also try Bidnav but there are limits to what your seniority can hold.