I finally slayed the two-headed dragon of Carn Dum and Dread Realm with these decks.
It's a super-Beregond strategy, piling up readying attachments and free equipment. It's not crazy that he can cancel shadow cards and defend for 6 on turn 1 with Erestor's ability making the combo cards available.
First copy of Keeping Count goes on Haldir. The second goes on Glorfindel. No longer a gimmick in my book, this card is reliable and useful in this build. Haldir typically gets a few notches by the fourth round, allowing Glorfindel to swing for a minimum of 6, but typically goes for 8-9 with attachments from across the board.
Arwen will use the additional resource on Erestor to help pay for Gildor's Counsel occasionally. By recycling Test of Will, some turns can completely mitigate the encounter deck.
Between Northern Tracker, Asfaloth and Evening Star, the build excels at location control. Arod and Steed are there for good measure.
Updated with Steward/Good Harvest combo needed for recent Nightmare quests.