For a December class, I couldn’t give you anything but a WAG. We may have had another system bid before then. The company may have decided to staff the fleet for all the international flying we are currently doing (IROs). There are a lot of unknowns. If it’s what you want, definitely put it first. Assuming you are starting on “heavy” day your odds will be driven as much by your relative age to your classmates as by how many slots are available. Good luck, it’s a great job.