This is the Chaos/Skaven deck that I played to win the king of the hill event at the FFG LCG days. Overall it has worked pretty well, it has some issues with dark elves though.
3 Clan Molder Elite
3 Savage Gor
3 Plague Bomb
3 Slaanesh's Domination
3 Ungor Raiders
3 Sorcerer of Tzeentch
3 Desecrated Temple
3 Warpstone Excavation
3 Burn it Down
3 Contested Village
3 Greyseer Thanquol
3 Clan Rats
3 Chittering Horde
3 Deathmaster Sniktch
3 Gutter Runners
3 Night Runners
2 Rat Ogres
The Slaanesh's Dominations, the Sorcerers and Greyseers all work fairly well against empire decks. The Chittering Hordes also help you in that match if they attempt to prevent you from drawing cards.
TL