To keep players from doing the same bunch of fates for hours on end, I think it would be better if fates gave XP based on the player's current level, and bonus XP should be given to different regions periodically to encourage players to shift from one place to another. Several regions could get the XP bonus at the same time to keep all the players from gathering into one location. So there could be an XP bonus for low level regions, one for mid-level regions, and one for higher level regions.