One approach I also use is Chase UR points to book EQM generating travel and sometimes mixed with my work travel. I might just use the UR points straight to purchase a P or S fare. Or if the increment is small between my work paid fare to a fare with CoS, I might use UR points to purchase up to P or S for the CoS. Some might see that as not the best use of Chase points, but I often have a bunch and it is a way to achieve status quicker or higher without spending cash.