An [avoid] that works.

data/campaigns/An_Orcish_Incursion/scenarios/4_Valley_of_Trolls.cfg

@@ -12,14 +12,14 @@
     {SECOND_WATCH}
 
 #define AVOID_CAVEDOORS
-    # The edges of the cave doors on both troll lairs.
-    # Keep the trolls from using these, so they have to come 
+    # The edges of the cave passages and mountains on both troll lairs.
+    # Keep the trolls from landing these, so they have to come 
     # out one at a time through the center hex.  Players
     # can use these to get in, solving what would otherwise
     # be an imbalance heavily favoring the trolls.
     [avoid]
-        x=16,17,4,5
-        y=3,5,13,15
+        x=15,15,16,16,17,17,  4, 4, 5, 5, 6, 6
+        y=3, 4, 3,  5, 5, 6, 12,13,13,15,14,15
     [/avoid]
 #enddef