Spirit Link's cooldown is only 1 second you can keep toggling onto new targets to reduce the cdr of your Envelop and other abilities.
Refreshing Break is essential.
Magic in the Blood. This card doesn't apply to your current heal cooldown, but on the one after your next heal.
Rest and Relaxation. 2 ammo on a 5 ammo clip is very good.
Future Generation. With how cards like this scale, it's perfect as a 1 point filler, but isn't as valuable at 2+.