Frost Damage and Major Courage, what's not to love?

Might not buff everyone to the ends of the earth, but I always find builds where you only help everyone else play the game so boring. This strikes a nice balance, still providing Major Courage, Minor Breach and Minor Toughness, while being able to deal really lovely damage herself.
If you want to play more heavily into support, sub in Powerful Assault for Frostbite and add in a bit more passive healing (lotus probably) of cleanse from the Support skills.

Able to solo Vet Vateshran, and highly customizable to sub in skills that you like, just stay frosty.