I would imagine that AMF would be looking mainly for pilots at a job fair. AMF has had a few recent job postings for pilots on Climbto350 so I would guess that they still need pilots.

As for OMA being junior, yes OMA is still (and will probably remain) a relatively junior base.

If a new hire starts in the PA31, they will start in one of the PA31 bases of which PDX, OAK, and BUR I believe are all that are left (someone with more current info might be better than me). If a new hire starts in the BE99, they could end up just about anywhere in the system. Nowadays, I would imagine BUR, OMA, and BUF would be where most new hires may end up but again, it is always based on staffing needs.