In 4 players I think this ally can be quite useful, since you will very often reveal at least an enemy and so it might easily end up "questing" for 2-3 which is not a bad value for 2 resources in Lore. A repeatable (even if conditional) Radagast's Cunning is very useful in my opinion, and it also comes with a good pool of Hit Points attached for all those archery quests.
Ally. Cost: 2. 0 1 0 3
Action: Exhaust Ithilien Tracker to lower the of the next enemy added to the staging area to 0 until the end of the phase.
Green gauntlets covered their hands, and their faces were hooded and masked with green, except for their eyes, which were very keen and bright. The Two Towers
David A. Nash
Heirs of Númenor #15. Lore.
Except it’s an action and not a response, so you have to commit him before staging, making him much much worse. If this was a response he would be golden. — Mathrandir 9