As far as at larges Arizona and Washington are on track, ASU and UCLA are on the fringe, Oregon St no way. Oregon St currently has the second worst SOS in the PAC, only Wazzou has played a worse schedule. The selection committee has shown in the past that playing a weak OOC schedule and piling up wins is not a recipe for an at large.
The PAC is going to get 2 or 3 in, depending on who wins the conference tourney.