Can I have 2 guesses? Pre-deadline and post-deadline?
My first guess is Ottawa and Columbus. Ottawa (according to Tankathon) has the easiest remaining schedule of the season. Detroit, New York, and Columbus all have the 5 toughest remaining schedules. I think Detroit hits a rough patch and the Rangers have just had bad vibes all season. With CBJ being able to stay above water, I think the returns of Jenner and some others (and hopefully Marchenko down the stretch) will be enough to boost them into a miracle WC2 finish. That's as long as they don't sell at the deadline. If Provorov and Kuraly and some others get traded then I take back my prediction on them.
As much as I hate to admit it, I'm not even factoring Boston into this race. They're cooked.