Longbeard Elder is somewhat underrated by the community. I think he's a good ally, especially in multiplayer, when you can advise other players on which characters to commit to the quest. Three resources is reasonable in leadership, and you'll get three willpower out of it with Dain. I don't usually trigger his ability in solo, because for it to be a net gain, locations need to be the top card over half the time; while one third is more likely. He's actually quite a good card.

Out of Sight is yet another case of "terrible outside of secrecy, pretty good while in range." For five resources you get an up-scaled spirit Feint. This has the potential to be okay, as long as you can get it's discount. But seriously, how often does a spirit/secrecy player end up with even two enemies engaged with him at once? I think this one will be staying out of sight for a good long time.

Ring Mail is a surprisingly versatile way of keeping your defenders alive and kicking. Dwarves and Hobbits often really need the defensive help and this can attach to any character, not just a hero. Bombur, Dori, and Bilbo are all good targets, not to mention the multitude of Dwarf allies with big health pools like Erebor Hammersmith. Very good.

Erebor Battle Master was completely overpowered in a Dwarf deck before his errata (spoiler alert: he still is). You could plop him down and he'd swing for a minimum of four for the rest of the game. As is, he takes a couple of rounds for him to get pumped up, but once you get your dwarf swarm going, the Battle Master rivals a Booming Ent trio. Just let him sit there, making Dain's boost look insignificant, staring down (up? he is a dwarf) orcs with that one eye of his.

Fresh Tracks, much like Hail of Stones, is surprisingly not a bad card. You may be looking at me funny, but the ability to keep an enemy in the staging area that one extra round can make a big difference. But don't expect the damage to kill the enemy as much as possibly help next round when the enemy does come down. Who knows? Maybe you could fit it into staging area attack deck.