The normal Progression on here is CB till 12, Unrest till 22, MM till 35, CoM till 50, KC till 55, Seb till 58ish, HS till 60. YMMV.
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So if you want groups that is the places to go. If you want to solo, I would avoid those zones because they are taking all the mobs for the groups. Plus a lot of the offbeat zones are really more fun than the high ZeM, Loot Zones most people tend to go to.
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