Originally Posted by
CPMaverick
Miles/certs are the only option before the window, and have equal or better priority to e500s within the window (depending on what list you get placed on).
Sure, but if you are a 1P or 2P, it may be better to use e500s within your window than miles outside your window, because mileage upgrades get placed on PB, while e500 upgrades get placed on PA... AFAIK.