Eiscue @ Sitrus Berry
Ability: Ice Face
EVs: 252 Spe, 252 Sp Def, 4 Atk
Opponent goes for physical attack, ice face activates, belly drum, heal from berry. Now you have max attack and 130 base speed. I use ice punch because icicle crash can miss. Liquidation for coverage. And then either iron head or zen headbutt. I chose zen headbutt because water resists steel, water, ice and fire. Without zen headbutt, eiscue would lose to water types. Unaware also destroys this set, so avoid that.