Honestly, I don't even care who wins. For the first time in a long time I'd be content with any of these teams winning.
The Cadets have had a really amazing run, and these last few episodes have been great for them. The Ice Dancers have been pretty solid antagonists throughout this entire season.

The Surfer Dudes, while having to come back, did sacrifice themselves for another team, and the fact they got rewarded for it is amazing to me because positivity is almost never rewarded in this franchise. That, and unlike the Best Friends, these two would be positive while still being compelling. Also, they're willing to share their winnings; talk about generous.

While typing all of this up, while my main team to root for is still my Day 1 pick the Cadets, I still wouldn't mind the Surfer Dudes win.