We can remove the zone with the Inferno cities. And move the Inferno cities themselves to the players' starting locations. Total: minus 2 locations.
All 3 secondary zones can be combined into 1 zone with neutral terrain, for example, lava. This will reduce the number of locations by another 4, and the chances of teleporting to the center will decrease significantly.
Of course, the size of the zones needs to be increased.
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