I myself am using the standard Mixed Attacker set. It consists of Close Combat, Hp. Ice, Volt Switch, and Taunt, with max Speed investment, heavy Sp.Atk investment, and a Naive nature. It works wonders at shutting down walls or set up sweepers, and can easily grab momentum against the opposing team with Volt Swtich. Hp Ice murders dragons, and Close Combat does massive damage to Steel types, even without much investment.