I can see why people wouldn't rate this ally, and initially I didn't either - Silvans were just too squishy for this to be that helpful. Now that they are a much more robust archetype though, the value of these has increased dramatically. They are perfect for keeping your Silvan heroes (especially Thranduil) healthy. They are also a great way to deal with Archery, as you can scatter the damage across multiple characters (most of the better Silvan allies have two hp, so can take a hit each), who will all heal in the refresh phase. Has definitely gone from somewhat of a coaster, to a card I use regularly in my Silvan decks.
Response: After a Silvan character readies during the refresh phase, heal 1 damage from that character.
The Dead Marshes #102. Lore.
Silvan Tracker is not as good as it could have been. It's statline isn't very good for it's cost and it's ability is limited by the fact that you don't want Silvan elves taking damage in the first place. Now, granted, if you can get one to survive an attack or two, then you really want this up and running. With multiple copies out, they could defend and then heal each other. A better option would be Galadhrim Healer. Of course, just for fun, you could get extra healing out of this by exhausting a hero for Captain's Wisdom say; and ready it again with Heir of Mardil or something like that!