Discardlock, Zoolock, Zoo Warlock, whatever you want to call the deck, this latest Warlock build with the Karazhan discard mechanics is the strongest Warlock list right now, Season 32, November 2016.
A few players brought this, or a very similar list to Blizzcon this year and it performed well. It has burst, card draw, taunts, sticky minions, a bit of everything. You can steal a win vs any deck, that’s what makes this list to effective. It’s also an easy deck to play, and the games are quick, so it’s a great ladder climbing deck.
Mulligan for plenty of 1-drops, you’re almost always going to curve out strong. Then just manage your draw and discards and always trade unless you’re facing down lethal in 1-2 turns.