top 4 in no particular order
Uruz - well balanced tribe which definitely has teamwork and leadership going for them. However whether a low member count on this server and in their K is worth the prestigious title of not being a mass recruiter - time will tell if the competition will break their morale.
Hop! Heard a bit about this tribe - again, a well balanced tribe with some fairly known names in there. perhaps they will be competitive and a threat to the world if like their name, they do not hop to the next world as so many people in general do.
Skittl I know the leaders and some of the members within skittl on this world. their survival or, 'domination' for a better word, relies entirely on if their leadership decides to actually stay on the world and progress with the tribe - if they can do this, they will do well
Use It all round tribe, with a few questionable players - however if their teamwork is up to par perhaps they will survive and become dominant in their area.
*my opinion is open for change whenever I feel like