Fly down the canyon and take out the Rams as you come to them. You will cross the path of the bikers twice. Try to take out at least two bikers, and then finish off the rams. Head in to the cave on the right and do all the rings and then the vultures. Take the upper biker path to get the rest head on.

Skill Point 12 Under 1:10

Hunter Look for a hole near the top of the canyon wall where the vultures are.
Orb1 Shoot down balloons