Yanmega with a Life Orb. Ability is Speed Boost.
Protect - for racking up Speed Boosts every other turn. If your Yanmega is a sweeper, this is perfect. (Watch Out for Trick Room opponents)
Bug Buzz - A STAB move, high base power, sure to 2HKO most (normally effected) Pokemon.
Air Slash - A STAB move, good base power. (Accuracy isn't 100%)
Giga Drain - If you are using a Life Orb then use Giga Drain to gain some HP back. Also, good power and accuracy. Great coverage against 4x effective Rock Types. They can't be faster than you because of Speed Boost + Protect.
I don't like Tinted Lens because unless you are facing a slow, weak Pokemon - you won't even use moves that aren't effective unless your opponent switches into them.