Degree or Ratings.
That is really something that you need to decide. You definately need the degree, so whether you do it know or later, I guess it really doesn't matter, as long as you get it. One thing the airlines look for during the interview process is currency. How much did you fly in the last 6 or so months before the interview. So based on that, I would finish my private, go get my degree, fly for fun during college, and then I would get all of my ratings. That way, when it comes time to do an interview, your are instrument current and proficient in the plane, and the degree is behind you.