In my personal opinion i'd save up on Mega Absol as of now. See Absol can learn this move set in the future when Poke Bank is released and can cause some real mayhem.
Trait: Justified
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature (+Spd, -Satk)
-Swords Dance / Protect
-Sucker Punch
-Superpower
-Play Rough
Regular Absol has slow speed compared to the threats in OU and you'll have swords dance anyway. What already damages in an Adamant nature is already covered by Swords Dance. Jolly is the better nature as it outspeeds and OHKO's Jolly Mega-Lucario with Superpower (Capped at 112 Base Speed). Superpower and Play Rough are amazing Coverage moves. The moveset is a Dark-Fairy-Fighting core that can cover all of the Metagame with Neutral damage. Having Sucker Punch and Night Slash on the same moveset is a bit illogical as the standard of the 6th Gen OU metagame is now much more fast paced and geared towards offensive threats. You cannot afford to be slow on the draw rendering Night Slash for users who play a more safe and tame play style. Sadly as of now; Superpower and Play Rough cannot be in the same moveset due to Superpower being learned only from the 5th Gen Tutors in B2/W2. Play Rough is an exclusive from the Kalos region.
That doesn't mean you can't make a substitute. Just use a Jolly Mega-Lucario with an identical set except swap out Play Rough and Sucker Punch with Bullet Punch and a Coverage move of your choice. If you are worried about rocks set your Skarmory up with Defog as it's unblockable.