Hearthpwn

@AardvarkPepper: I've already tried to run a facerush it's easy and may kill the opponent after 4-5 turns, but it highly depends on your luck in the first turn the deck can be countred easily if the opponent focuses at destroying your minions instead of damaging your hero during early turns

Doomguard the 5/7 demon destroys 2 random cards I was using it before but I replaced it by Argent Commander I find better, It deals 1 less damage and have the same survivability as Doomguard but it doesn't destroy cards and I can combine it with Blood Knight

Abusive Sergeant  you're right it's a good minion 1 mana for (2+2/1) is a good trade I will replace [card]Shattered Sun Cleric[/card] and see how it works :)

Edit:

I played few games with Abusive Sergeant it's quite useful the +2 atk it helped me kill some minions I couldn't kill before in early turns.

I want to add Big Game Hunter into my deck but I don't know which card I should remove, maybe Blood Imp and see how it works

This is my aggro warlock deck I find it weak against aoe spells and somtimes can't kill big taunts

•     Is it a good idea to use Argent Squire/ Blood Knight  combo to get a big minion at early turns?
•     Do you think I should replace Blood Imp by Young Priestess?
•     Should I remove Flame Imp?
•     Knife Juggler is always focused and doesn't survive more that 2 turns, should I replace it?
•     Should I use Big Game Hunter?

feel free to criticize, suggest, comment, etc..