We'd need to be one of the top 24 teams to be a 2nd seed (or top 12 teams to be a 1st seed). At present it looks like there are nine sides in the group stage with a better coefficient than us and 11 sides in the various rounds of qualifying with a better coefficient than us. But to that you still need to consider the remaining group stage entrants, qualifying entrants, and CL qualifying knock-outs - some of whom will also have better coefficients than us. But how many, I don't know.
Worth noting that the quality of team - coefficient relationship is a bit hazier with Europey-level teams, as well. Clubs that get into European competitions every year through weaker leagues tend to have stronger coefficients than many from good leagues that haven't qualified for some time. I'd much rather face Rapid Wien (if they reach the group stage) than Mainz or Celta, but Rapid has the better coefficient because they dusted a weak group last year before getting annihilated by Valencia in the first knockout stage.

