I've been playing for about 2 months, and am still having trouble with this game. This is my current deck. I went with Dark Eldar since they seem to fit my play style best. The control/"choke" aspect seems to work well enough, but the deck feels like it's lacking the push it needs to win.
 
Warlord: Packmaster Kith
 
Army:
2x Murder of Razorwings
3x Sslyth Mercenary
3x Rogue Trader
2x Coliseum Fighters
2x Incubus Warrior
2x Biel-Tan Warp Spiders
2x Eldar Survivalist
3x Warlock Destructor
4x Kith's Khymeramasters
2x Baleful Mandrake
2x Syren Zythlex
3x Klaivex Warleader
 
Events:
2x Raid
3x Foretell
2x Superiority
2x Pact of the Haemonculi
3x Power from Pain
2x Doom
 
Attachments:
1x Agonizer of Bren
2x Suffering
 
Support:
1x Khymera Den
2x Archon's Palace
 
My card pool consists of 2 core sets and the three current warpacks. I most likely won't be getting a third core, so I want to get the most out of the cards that I do have. Any advice would be greatly appreciated.