You would be competitive at any regional. May or may not need FR/IPC but would need a 1C medical and meet ATP mins (with your times, I'm sure you do).

You would probably want to do a little GA and do a little sim prep before training to knock the rust off (SKW would probably make you take a sim eval at the interview).

But the regionals are no place to hang out for long, and it's getting worse. I wouldn't consider it unless you have what the majors are looking for...degree w/ good grades (>3.0), clean FAA and criminal records, and can pass a personality profile test. Also you'll need civic involvement/volunteer work and some internal references but you'll have a few years to work on that if needed.