One aspect of military strategy that some aren't aware of is the logistics of it.The maintenance and support of an army is a strong a factor that plays into the success of military operations and involves providing troops with the materials and services they need to continue their mission. In a way, it feels like that's what this deck does! It can carry it's own weight too in multiplayer.
As soon as I opened up my Temple of the Deceived AP I started getting the thought of building an Elfhelm support deck for a weekend meetup with other players. He did prove his worth as he provided buffs all around the table, but I received some honest critique that the initial deck was skimp on allies. After hearing this, I worked on it at home, streamlining it to provide many attachments and allies. I think my labor resulted in a nice deck for helping out other players at the table. See for yourself here: http://ringsdb.com/decklist/view/3013/master-of-support-1.0
Erkenbrand is there for sentinel defending and utilizing The Day's Rising, Elfhelm to boost mounted heroes of course, and Bifur helps with resource smoothing and uses Narvi's Belt to give us access to our off-sphere mounts. Although we have King Under the Mountain, Master of the Forge is by far the biggest helper in getting the attachments in hand. From there I play the mount and Dunedain boosts as needed for the other players, I can send the Mirkwood Explorers and Naith Guides questing along with maybe Elfhelm. Elfhelm and Ceorl are both scouts too, and this allows the use of scouting party to help with big willpower pushes. Faramir is used for boosting the main questing player and For Gondor! and Silverlode Archer help out in various combat situations.
I have O Lorien! to cheapen the cost of the Silvans in this deck, but if there is another deck using it there plenty of other attachments in the sideboard we can use such as Cram, Miruvor, and Ancient Mathom. I have also thought about Song of Kings too, since not all primary defending heroes have the leadership sphere in order to qualify for Elfhelm's boost. Athelas isn't always out of consideration either, it seems in multiplayer that another player will often have allies with the healer trait.
I look forward to playing this deck again for sure, feel free to tell me what you think about it.