Updates: tinkered with card counts and removed Gandalf's Search for another copy of Imladris Stargazer and Daughter of the Nimrodel.
Using an expanded, though still fairly limited cardpool, I've built this deck to a) play three characters I'm very excited about, and b) be sure that it can hang in solo play.
I've taken some things I've learned from playing Gandalf previously regarding his toys and applied them here, along with a fairly diverse Ally base because of the synergy between himself and Elrond. Several higher costed Ally cards are included because of the combo of Gandalf's static top of the deck ability and Vilya.
The main idea is to spend the first few turns working towards action advantage with the Hero cards using readying Attachments like Shadowfax and Courage or Light of Valinor to keep up the questing pace.
I appreciate taking the time to look at this deck and welcome feedback, including recommendations for the next purchase to strengthen this as a solo deck.