Hearthpwn

How times have changed.

You just need experience on demonlock. Try to watch some demonlock videos or just keep playing.

Always keep 1 aoe on your starting hand.(Not both hellfire, shadowflame)

You need twilight drake, void callers to win. Void callers are really op against aggro if you have a demon in your hand. Don't be afraid to get your Jaraxxus summoned by void callers. Most of the time you wouldn't be able to use them against aggro decks anyways. It's so much better as a 3/15 body with taunt. (I just instawin against hunters if my  voidcaller dropped a jaraxxus at turn 5)

Lastly, don't play too greedy against aggro decks. Example: Not coining out twilight drakes, void callers,. Not dropping your ancient watcher earlier because you want your drakes to have more health. Taunting watcher with a void caller, twilight, giant is really op against aggro decks. 

A tip against hunters: If you drop a giant, twilight and he plays a secret, don't attack with your minion. Instead, taunt it with argus, sunfury, and use them to trigger the trap next turn.

Thank you! I climbed from rank 12 to 5 using this deck. I have a 60% winrate at first but after I learned how the deck worked my winrate skyrocketed. I had the most trouble with paladins and the easiest against dragon priest and hunters.

I crafted Mal'Ganis just for zoo/demon zoo. It's a great card and totally viable in a range of Warlock decks,