This deck is good, decent quest and decent attack, but a lot of 'manipulation' of locations in play:
I played this deck in Emyn Muil nightmare, in 2 players, and i did a 92 points of score. Really good.
Heroes:
Denethor (to avoid treacheries and select locations)
Glorfindel (cause of asfaloth)
Idraen (no comments ^^)
Allies: x19
Ravenhill Scout x2 (he becomes really good now)
Lorien Guide x2 (it becomes more usefull now with Idraen)
Northern Tracker x3 (no comments)
The Riddermark's Finest x3 (the most loved horse by Idraen ^^)
West Road Traveller x2 (good to change locations, and after to commit to quest)
Arwen Undómiel x2 (no comments)
Minas Tirth Lampwright x3 (i love it, you say 'treachery' and you avoid it and more options to get other location)
Greyflood Wanderer x2 (it is very good, in a lot of situations)
Attachments: x16
Thror's Key x3 (really good for nightmare locations)
Ancient Mathom x3 (this deck needs cards, of course, and this will be the only way to reach it)
Light of Valinor x2 (no comments)
Miruvor x2 (it is very good, it gives to you several options and good combinations)
Asfaloth x2 (no comments)
Thror's Map x2 (cool for some locations)
Warden of Arnor x2 (cool, i have played it and it is very comfortable)
Event: x15
Secret Paths x2 (the wp is decent, even few, we will need at least first rounds)
Strider's Path x3 (always good)
Elrond's Counsel x3 (always good)
Strength of Will x3 (very good here, sure you can exhaust Idraen for it ^^)
A Watchful Peace x2 (to 'recycle' locations is here is nice, good combo with Wanderer now)
Shadow of the Past x2 (to 'recycle' locations that was revealed as a shadow cards)
With this deck, you never will see 3 or more locations in play ^^.