Assuming for the moment that I get 1 at each level I'm at:
1 Blood Wind or Benign Transposition
2 Guidance of the Avatar or Alter Self
3 Shivering Touch
4 Favor of the Martyr or Shadow Conjuration or Mirror Image, Greater
I chose these as they seem to give access to abilities the Druid wouldn't otherwise have.
Edit: Let me add that the DM will not abide Wings of Cover, Wraithstrike, Wings of Flurry, or Celerity.