In the other groups, just pick whoever you think would be easiest to beat in a semi or final, I suppose just the lower seed.
In our group, you root for the team you feel you're more likely to beat, in the game today.
Because we didnt play everyone, it's hard to say that we should beat x team. The east teams seem to be better in general, so maybe pull for the lower west teams. Really its just preference. You have to win the right game in your group then 2 KO games.