I've had a lot of success with this one as my lead.
Ambipom @ Life Orb / Silk Scarf / Muscle Band
252 Atk / 252 Spe / 4 HP
- Fake Out
- Ankle Sweep / Low Kick
- U-turn / Pursuit
- Return / Taunt / Pursuit
Obviously, if you're running Return, the Silk Scarf is the way to go. This works great...