What exactly does a clan do in Zombies anyway? Shouldn't you call it more of a team?? There are 0 clan challenges for Zombies, so I'm not sure how you would even participate as a clan...
And, Shotguns are not the best rank dude. Your going to get a TON of people that have their shotties but glitched to get them so their skills don't quite match their rank. Good luck with that. IMO, I'd rather be on a team full of knives then full of shotties if I don't know who they are.