Enlivening edges are what they are. I never thought them worth it. There is no level bonus for dispel.

Go for the throat and ricochet skin are probably the best edges available. They're useful in every fight and give a consistent bonus.

Shifter edges are the definition of cherries on top. Other then those two they don't help much but just make things easier.

The two main things shifters need to worry about are forget and energy drain. Period.