It is really hard to predict "what's senior" and "what's junior" because most of these bases are so small. LAX has 9 F/O's. If they all want to stay there and none take an upgrade, no one is getting in. OTOH if they put another plane there or just a couple guys move or upgrade, all of a sudden you could get J/A'd there as a new-hire. The next round of upgrades, maybe Jan. or so, will shuffle the deck again and things could look different than they do now.