by rwinder
I'm not the best person to ask rule questions as one might guess from earlier reports, but as far as I know you can play the Eagles are Coming as many times as you have copies. You might want to time playing them when you've got enough resources to play an ally and want an eagle right now.If another Black Uruks showed up it would remain in the staging area. It has a higher engagement number (32) than my threat (28) and I can only optionally engage one enemy per round.
I'd have to check Radagast's card, but I assume it is technically possible to heal the Watcher with him. I think Radagast can heal Gollum (another creature) who is not an "ally" technically. I'm not sure why anyone would want to unless you want him to have a very specific number of wounds on him. Maybe in two player if you have Legolas in a separate deck boosted up with attachments and you want to spare the Watcher briefly so Legolas can get the kill so he can trigger his special ability.