Just an idea to make this a more active clan based game, how about creating a secondary village that all the members of your clan can contribute to, u can have the leader set it out and nominate certain players to adjust it, and the other members can upgrade buildings as they see fit I would say a maximum of 5 builders at a time and only 1 builder from a clan member at a time, you could create a clan league for it, so only members of your league can attack your clan, and at the end of each league the resources in the clan base is split between the member of your clan, I would suggest a separate league list for clans like the current league list and an option to attack in it, I would say u can only attack the clan once per league so as to cut down on farming, also maybe have the storages hold more and the winnings from attacking other clans all goes to the clan base and maybe a percentage of your raids goes to clan base aswell. Just an idea excuse my English.
