Tweeked config to make THe End not so insane.

src/main/java/world/bentobox/skygrid/Settings.java

@@ -97,7 +97,7 @@ public class Settings implements WorldSettings {
     @ConfigEntry(path = "world.end.generate")
     private boolean endGenerate = true;
 
-    @ConfigComment("The End blocks. END_CRYSTAL is blocked because it causes serious performance issues.")
+    @ConfigComment("The End blocks.")
     @ConfigEntry(path = "world.end.blocks")
     private Map<Material, Integer> endBlocks = new EnumMap<>(Material.class);
 

src/main/java/world/bentobox/skygrid/generators/BlockProbability.java

@@ -1,5 +1,6 @@
 package world.bentobox.skygrid.generators;
 
+import java.util.NavigableMap;
 import java.util.Random;
 import java.util.TreeMap;
 
@@ -10,7 +11,7 @@ public class BlockProbability {
     /**
      * Tree map of all materials and their probabilities as a ratio to the sum of all probabilities
      */
-    private final TreeMap<Integer, Material> probMap = new TreeMap<>();
+    private final NavigableMap<Integer, Material> probMap = new TreeMap<>();
     /**
      * Sum of all probabilities
      */

src/main/java/world/bentobox/skygrid/generators/SkyGridChunks.java

@@ -54,7 +54,7 @@ public class SkyGridChunks {
             Material.WHITE_TULIP
             ));
 
-    private static final int PRE_MADE_CHUNKS_NUMBER = 30;
+    private static final int PRE_MADE_CHUNKS_NUMBER = 100;
 
     private final SkyGrid addon;
 
@@ -115,7 +115,7 @@ private void setBlock(BlockProbability prob, int x, int y, int z, List<SkyGridBl
         // Get a random block and feed in the last block (true if cactus or cane)
         Material blockMat = prob.getBlock(random, y == 0, false);
         // If blockMat is not "a block" then cannot be generated
-        if (!blockMat.isBlock()) {
+        if (!blockMat.isAir() && !blockMat.isBlock()) {
             blockMat = Material.STONE;
         }
         // Check if the block needs dirt

src/main/java/world/bentobox/skygrid/generators/WorldStyles.java

@@ -207,9 +207,9 @@ private TreeMap<Integer,EntityType> netherSpawns() {
      */
     private TreeMap<Integer,EntityType> endSpawns() {
         TreeMap<Integer,EntityType> s = new TreeMap<>();
-        s.put(50, EntityType.ENDERMAN);
+        s.put(100, EntityType.ENDERMAN);
         s.put(55, EntityType.ENDERMITE);
-        s.put(65, EntityType.SHULKER);
+        s.put(1, EntityType.SHULKER);
         return s;
     }
 

src/main/resources/config.yml

@@ -694,17 +694,18 @@ world:
   end:
     # Generate SkyGrid End - if this is false, the end world will not be made
     generate: true
-    # The End blocks. END_CRYSTAL is blocked because it causes serious performance issues.
+    # The End blocks.
     blocks:
-      CHEST: 5
+      CHEST: 1
       END_ROD: 1
+      OBSIDIAN: 5
       CHORUS_PLANT: 2
-      OBSIDIAN: 1
+      PURPLE_STAINED_GLASS: 50
+      AIR: 200
       END_STONE: 200
-      SPAWNER: 5
       GRAVEL: 10
-      PURPUR_BLOCK: 10
-      PURPLE_STAINED_GLASS: 10
+      SPAWNER: 1
+      PURPUR_BLOCK: 50
 
   # Biomes - this will affect some block types and tree types.
   create-biomes: true