Artifact Deck Guide:
Triumphant Meepo Jank

Like Meepo but wish he was playable?
Want to deal over 100 damage in one turn?
Want to draw ALL the cards?
Now you can!
Axe (edit: recent nerf to Axe makes Legion Commander a slightly better pick, especially with black aggro decks running around) and Bristleback for early game bashing. They're flexible but I like Viscous Nasal Goo amplifying Ignite. The Omexe Arena is key. You'll lose a lot of Meepos at a time from board wipes (theirs and yours) but you'll end up ahead every time. It's possible to run out of deck and item cards from the card draw and income, hence additional cards.

The finisher:
Ogre Magi -> Incarnation of Selemene -> Divided We Stand (multicast??) -> Time of Triumph.

Side strat:
Ignite Kanna's lane for easy Prey on the Weak. Pick up Book of the Dead so you can At Any Cost to your heart's content.

The meta:
That popular blue/green deck - Built this deck around playing against this with a pretty good winrate. Move your red heroes around to pick off Drow Ranger. Ignite their Kanna's lane or wherever they Ignite because you know Prey on the Weak is coming. Literally the only card you need to watch out for is Thundergod's Wrath. Try to keep initiative and commit to lanes with The Omexe Arena. Look for value Drow Ranger kills and save Annihilation for Emissary of the Quorum.
Black/red aggro decks - Relentless Zombie and almost everything dies to At Any Cost. Keep those Friendly Fires close.
Black money decks - Regardless of who you fight, your opponent will make a lot of money off Meepo anyway. Mitigate this with Revtel Signet Rings. Try to watch which lane to deploy your Red heroes for Smash Their Defenses!. Again, just keep your Meepos in The Omexe Arena lanes for Ganks. Don't rely on Incarnation of Selemene because of Slay; she'll still be useful for when they abandon a lane, thinking you can't kill their ancient in a turn though.