You have to define "best" or else people will flame each other saying "MY CLAN IS THE BEST YOUR'S SUCKS" and stuff. If the "best" is the biggest, then its probably GpW, DM, or CC. If "best" is left undefined the DM members will say DM is the best because its their clan, and same for GpW, and CC, and all the other clans. If its the most active, it will probably be GpW. But if best is left undefined, people will start the flamewars.