get the score calculator for mozilla and start 
google.com -> search for “ikariam score”
its one of the first links. Download “greasemonkey” addin for mozilla and then after its installed, click the link for the score calc thingy, and when you play and click on a town… it shows the score, military score and gold of the towns.
attack the 0 military towns with the highest level/score… and use just one swordsman