Still, 2 days played account got to kog is something. whether it's because a lot of strong players have left ranked or because of the guy's skill it still mean that the deck is good.
To win with an Alien deck you need a good strategy and a skilled player will dominate with it. Ironically, the only hard counter to Alien is Alien itself :P (Also if you win with Alien you are proven to have an IQ over 200)