I know this card tends to get panned for its effect (and the dislocated thumb), but consider the potential impact within a Dale deck as a counter to archery and/or treacheries that spread out direct damage (Necromancer's Reach, Wasted Provisions, Biting Wind, etc.). I've healed up to 6-7 damage from the board in one go with the Messenger, and so she tends to be a one-of in my Dale builds. Often, that one burst of concentrated healing is enough to keep an army of Dale allies (who all tend to have multiple hit points) around long enough to finish a quest.