OnCenterline....
Some good advice. I'm not sure on the Allegiant, JetBlue and Atlas advice though. Allegiant hiring mins are 3000tt, JetBlue isn't hiring, and Atlas isn't too well known for hiring 1300tt (even mil).
You make it sound as though JetBlue will hire anyone, and that Atlas is some bottom rung ACMI. Neither is true.
With 1300tt and 400pic, I would advise the OP to get on with a regional with no/minimal commute and continually network and update all resumes with every major/legacy.