According to the system chief pilot himself, there will not be another mass application window. It's all SmartRecruiters/Talent Community from here on out.

And yes, given Alaska's projected hiring numbers, it could be years before you get an interview. I've been actively working on it for over two years now and hold out very little hope of getting an interview any time soon despite having internal recommendations (that they won't look at until the interview), times that are about twice what you have, and Alaska recruiters telling me I'm a strong candidate every time I talk to them. The numbers are much more in your favor nearly everywhere else.