I'm sure there are plenty of people out there that are more qualified than me making better decks than this one could ever hope to be but I did the best I could with what I had. In the spirit of using (mostly) only what I have in real life, this deck uses the expansions I physically own (except I do not own three core sets). Regardless, the focus of this deck is on getting useful and powerful allies out with some heavy heroes to back them up. All of the attachments are only for heroes and most of them are Gandalf's toys.
The typical strategy here is to get a Wizard Pipe on Gandalf and a Steward of Gondor and Vilya on Elrond. The other gadgets and tricks of the deck just flow naturally out of that setup so the earlier you get it the better off you'll be. Manipulate the top card of the deck with the Pipe to pull some heavy allies off with Vilya and use Elrond's ability to pay for any other ally out of your hand. Glorfindel is there to help mainly with combat (and definitely questing if you can find a Light of Valinor for him) and also aid in getting out some threat reduction events (the only events in the deck). Some Wardens of Healing pair nicely with Elrond's passive heal buff and can help you fend off some archery damage or unexpected combat damage. Readying effects should be available most of the time with Shadowfax and Unexpected Courage making an appearance.
The difficult part in using this deck is getting it off the ground. A desired opening hand would include a Pipe, Title, and Ring. There are many different ways the first round can go, but usually you will either have to choose between Elrond getting his resource generation or his Ring. However you do it, the second round should start looking pretty good. Keep your threat down with the Counsels and Greetings and try to not take too many enemies too soon. Gildor can help with some card manipulation but it shouldn't be necessary.
I'm sure there are many tweaks that can be made to this deck to make it much better, but it works well for the first iteration and has played well at least against earlier quests (which isn't saying much, I suppose). Still, it's fun to have some big heroes and seeing a field of huge allies in just a couple of turns is pretty cool.