Ok so I want to build a support deck for a two player team. The point of the deck is to try and pull off a secrecy effect that can keep two players at a very low threat level. The key cards are Rivendell Minstrels and Song of Earendil. I have never been able to make it work.

Do you want to go with 1 or 2 spheres of influence?

A couple cards you could try would be "Love of Tales" (Lore) or "The Galadhrim's Greeting" (Spirit).

If you're using Song of Earendil you have to do the Wandering Took combo!

I tried this for a long time as well with Strider/Glorfindel and Theodred/Legolas as a secrecy combo but never really got it to work. Secrecy just isn't worth doing (IMO) with the limited cardpool.

I think with the coming Hobbit strategies, this type of deck may become more viable, especially when paired with an Archery deck and Great Yew Bow.
The hobbits could get out Song of Earendil/Wandering Took (thematic!) and get everyone's threat way down.