I haven't gone too high with this team yet, around 1550, but thats a giant improvement over my last 1350 record.
Greninja @ Life Orb
Ability: Protean
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Extrasensory
- Hydro Pump
- Hidden Power [Fire]
- Ice Beam
Greninja is probably one of the best...