This is a rather simple answer. Max-Attack + Sand Rush
Here is a good set for this strategy:
Excadrill @ Air Balloon
Trait: Sand Rush
Nature: Adamant (+Atk, -SpA)
EVs: 4 HP/252 Atk/ 252 Spe
After one Swords Dance, Excadrills attack reaches a mighty 810 with the Adamant nature. There is no need for a speed boosting move because in the sand, his speed is 550, enough to outspeed even an unboosted Deoxys-S!! Air Balloon is for avoiding anything that is trying to OKHO him with a ground move.
A +2 Earthquake will OHKO or heavily dent anything that does not resist it. Iron Head is for hitting anything that resists or is immune to E-quake. And with his defensive typing, his immunity to Toxic Spikes, his resistance to Stealth Rock, and his immunity to Spikes(with the air balloon), it allows him to switch-in and use Rapid Spin to clear the field!!!
I hope that this convinces you to choose Max-Attack + Sand Rush!!