If you want cards you can use and a solid chance at clintz then go with Classic or Elite,
Difference is Classic makes you choose 6 different clans, and Elite makes you choose 4 at the cost of 5 more credits.
Still don't get the upside to this? It means if you want a narrower selection choose elite, and if you want a broader selection go with Classic. I personally go with
Classic: Vortex Skeelz Uppers Pussycats Sentinel and La Junta.
Elite: Vortex Skeelz Uppers and La Junta
If you want to take your chances, sure, go with New Blood , Dregn C Beast Tsubame will all make you alot of money. But the other cards will probably be from clans your not interested in using, and odds are wont be worth too much.