I would say overall, ANC domicle is the most junior. Obviously; since most don't want the a$$ pain of getting there and back. It's great if one lives there. Most can get to Europe quicker than they can get to ANC.
And the A300 is generally the Junior Base top to bottom lower 48. One, the Airplane blows, and two the trips are bad. Unless one is really senior. Then one can hold the old DC-8 style trips. Very Nice pairings. #300 seniority or higher.