Interesting opener. Of course, that means that the east would expect a goodly share of the AA 767-200/300 seats (they have 73 vs 10 for US). Plus a goodly share of the AA 757 seats (AA 124, US 24). Plus a share of new deliveries of 767/777 that AA has on order (US 0). Plus, if the C&R's look anything like what's been offered to the westies there'd be little protection. And you really think APA or the American pilots would jump on that? If so, they've probably got some bridges and swampland to sell you first...
My guess is that AA pilots might settle for relative position by equip/model/seat (giving them the top of the list for the 777/767-300) then a ratio for the rest determined by the number of each equivalent type (7.3 AA pilots to 1 US pilot for the 7672, 5 AA to 1 US for the 757, etc). But that definitely wouldn't be their opener. Of course, you could push for arbitration - when was the last DOH arbitration award?
Jim