The focus here is on questing, since you don't need to worry about combat because of the Hinder keyword. I managed to beat this mission on the first attemp with this deck, through the 2B step.
Aragorn is grants you acces to Leadership sphere, which is great because his main attachments are there. Glorfindel keeps your starting threat low and Gríma reduce the cost of your cards, and also has a average willpower.
Keep your threat low with Elrond's Counsel and The Galadhrim's Greeting so the Huorns won't engage you, this way they won't remove remove the progress tokens from the quest. Light of Valinor is here so you can avoid Glorfindel forced effect, and also, if he's ready after questing you can attach Mugash to him.
Faramir, Celebrían's Stone and Sword that was Broken help you increase your willpower. Northern Tracker, The Riddermark's Finest and Asfaloth help you explore locations and get rid of them, also, Ancient Mathom increase your draws.
Radagast's Cunning and Secret Paths are more support cards to avoid the on the staging area. Power of Orthanc ih here just because there's Condition attachments on the encounter deck, but you can change them for Miner of the Iron Hills.