I have improved this deck a bit over the course of a few months, and I'm finding that it has become a bit better after more tweaking. I switched out Galadhon Archer for Marksman of Lórien, switched out Daeron's Runes for Heed the Dream, took out Naith Guide, 1 Boomed and Trumpeted, and added an Errand-rider, 2 A Burning Brand, and Send for Aid. It still operates with a bit of slow tempo in the beginning, but soon the Ents catch up and become an overwhelming force!
The best start for this deck entails having at least one of the allies in hand (Booming Ent, Derndingle Warrior, or Marksman of Lórien, a Steward of Gondor or Errand-rider to get resources on Elrond, and it is also nice to have some way to dig for specific cards with Heed the Dream, Entmoot, or Gléowine). We will use Hirgon's abilities whenever we can, both the cost reduction and the attack/defense buff. The Ents will be exhausted the round we play them, unless we engage an enemy to trigger Faramir's response. This means that the Ents could attack on the round they enter play with an added stat buff. Threat will soon approach 40, and the few valor cards in the deck will be very usable then, but watch out for a Favor of the Valar to keep you from threating out. As more allies pile up, this deck will become quite capable at both questing and combat thanks to its strong core of Ents. In case you were wondering about Ent Draught, it is good to play on Derndingle Warrior or Déorwine which are excellent sentinel allies that must be bolstered by healing. A Burning Brand goes on Elrond of course so that he doesn't care about shadow effects while defending. Boomed and Trumpeted is also amazing, since you can actually defend with a Booming Ent so that it takes damage and ready him for a massive counterattack.
I have played with this deck a bit in two player to test its capabilities, and it has generally delivered each time. Though it can be slower without an early Steward of Gondor, that is not necessarily crippling. This deck ends up doing a fair share of the questing, fighting, and healing while also being able to share resources and card draw with other players. The presence of ranged and sentinel allies ensure that it can help with combat around the table plus its Booming Ents can turn into boss-crushers. In one play-through of Into the Pit, it slightly outshone its / partner deck when it came to survivability, and carried the team on to victory. It is hard to stop a deck with abundant healing, allies with spacious hit pools, and multiple defenders in case one gets taken down. A deck that has the spirit sphere is still the ideal partner for this deck because of the cancellation and threat reduction spirit provides that covers for this deck's weaknesses.
If you want to see the decks that are the ancestors to this one, check out these two decks:
http://ringsdb.com/decklist/view/362/hasten-the-ents-2.0
http://ringsdb.com/decklist/view/2131/mender-of-decay-2.0