This is my Grey Wanderer Glóin deck. My idea was to use the Contract to preferably heal instead of gaining ressources most of the time, cause the damage he takes allows you to get resources easily.
Key Allies: Knight of the White Tower, because his downside is non-existent in this deck and Gimli for he has amazing stats all-around and can ready himself. Gandalf is mostly used for cards if you haven't found the draw stuff yet.
Key Attachments: Strider is chosen for starting attachment but later the +2 can get away to gain more attack power, Dwarven Shield is good for safety, Heir of Mardil is wonderful to ready him after he takes damage. King Under the Mountain and Lord of Morthond are the main draw engines of the deck.
Key events: Captain's Wisdom is the best card to see in your starting hand, play it and immediately use the contract, resulting in 5 ressources to spend turn 1, Sneak Attack and Open the Gates are nice to get temporary allies in, Durin's Song is important for emergencies.
General strategy: let Glóin tank what he can tank, but don't get unnecessary risky, when you have other allies to defend. Starting hand should have one of the resource cards (Steward, Captain's Wisdom or even Dwarven Shield), and one of the always eligable draw cards (KUtM, Erestor or Prepare for Battle).