So yeah, this is what I've come up with. I just bred a batch of Larvitars and one of them intrigued me to try this set:
Tyranitar@Expert Belt / Life Orb / Leftovers
Ability: Sand Stream
EVs: 236 Speed, 200 SpA, 76 Atk, Naughty (+Atk, -SpDef)
~Dark Pulse
~Hidden Power [Grass]
~Stone Edge...