I recently started including a package of goblins in all of my decks. Matron, Cratermaker, Treasure Nabber, Shusher, Engineer, Murdurous Redcap, Chirurgeon, Settler and more. They're not the always the best options but they're reliable. Just about the only thing goblins can't help against is enchantments. But there are a few changelings that can and, being technically goblins, Matron can tutor them. Whenever building a deck you should always ask the question, "what can goblins do for my deck?" You'd be surprised what a small goblin package can offer a deck.