Terra dei Demoni

And finally, the last idea for today: in the Terra dei Demoni template, replace GO=45000 with, say, 6000 and sharply increase the density of valuable objects in the treasure rooms. Then, the high GO won't be an obstacle, and the probability of blocking in the central treasure room will be so high that it will eliminate re-encounters and generally prevent early penetration into the center.
However, several towns need to be added to the center, and the zone itself needs to be made larger...