glané sur le forum officiel, venant d'un membre de l'equipe SIGIL

Right now the progression of Kojan is from 1-20 overland, with the Tomb of Lord Tsang supporting players into their mid twenties. The level 45 mobs you see guard the entrance to one of our highest level dungeons - The Fallen Kingdom of the Ulvari - which is for players from 45-50+

Unfortunately for the levels 25-45, you'll need to hit up Qalia/Thestra and possibly some of the islands inbetween.

If you want to be your best against the Ulvari though, you won't want to miss any of the quest lines involving The Tomb of Lord Tsang =P

en gros, pour les kojaniens, il faudra s'expatrier (aller sur Qalia ou Thestra) entre les niveaux 25 et 45, bien que ce ne soit sans doute pas définitivement figé