This deck is the very definition of support, it will heal everyone left and right on the board which is especially usefull for quests high in Archery and Direct damage effects (Druadan Forest, Journey in the Dark etc). Though I have to admid I created this deck solely for the healing capabilities of the heroes and threw most cards in that said HEAL, I believe this deck works fine as long as there are other people who can do the heavy lifting.
Possible combos are the Stargazer and Miner to provide resoures for Glorfindel, he then heals for +1 thanks to Elrond.
Elfstone can be used to get allies out quickly, this includes the more expensive allies like Daughter since those 3 resources are best spend elsewere.
Unexpected Courage and Miruvor can be placed on Elrond so that he can use Vilya (and perhaps Stargazer) to get heals out instanty and ready afterwards. Elrond also receives a spirit resource icon as soon as Vilya hts the table, which helps to blend the dual-sphere together.
Elffriend can be stuck to any hero played by others to benefit from Silvan Trackers each turn that they ready.
Some Threat reduction had to be included since Elrond and G(Lore)findel who both sit at a high threatcost, Arwen has been included for resourcegeneration, Theme and the resources provided by Ziggy and the Stargazer (my own version of FIli <3 Tauriel).
Thematicly, this deck is just Elrond doing what he does best: Healing in Imladris