Currently on the en servers, there are 11 open worlds. Going by the numbers en11 is the most competitive world available to players that are looking to have a prolonged war. en2, en5, en13 are all above 70% for the leading tribe, en12 is above 80. en10 the leading tribe is double the size of 2nd tribe, en14 and en15 will be over 70% soon enough. The newer worlds en16-en18 are all either new or don't have the sheer volume of original players or villages that en11 has. Basically what I am getting at is if you are a quality player that wants to play and invest time into this game, this is the world you want to join. With pushing rules being instituted, clearing out coops is a major emphasis. If you are a good player, I can set you up with villages to take so you will glide past the early game fairly quickly. I have already got some larger players from other worlds to come join.
@carrot70 who is the leader in en14 by a wide margin and has recently joined. He has been with us for about a week and has over 30 villages. If this is something that interests you let me know