diff --git a/nether_mobs.lua b/nether_mobs.lua
index 64606d4..7944489 100644
--- a/nether_mobs.lua
+++ b/nether_mobs.lua
@@ -1,8 +1,11 @@
+local positions_per_mapblock = 32
+
 spawnit.register({
 	entity_name = "nether_mobs:dragon",
 	groups = { monster = 1, nether = 1 },
-	chance = 150000,
+	chance = 60 * 60 * 42,
 	cluster = 1,
+	positions_per_mapblock = positions_per_mapblock,
 	on = { "any" },
 	min_y = nether.DEPTH_FLOOR,
 	max_y = nether.DEPTH_CEILING,
@@ -15,6 +18,7 @@ spawnit.register({
 	groups = { monster = 1, nether = 1 },
 	chance = 15,
 	cluster = 2,
+	positions_per_mapblock = positions_per_mapblock,
 	on = { "nether:sand", "nether:rack" },
 	min_y = nether.DEPTH_FLOOR,
 	max_y = nether.DEPTH_CEILING,
diff --git a/yl_nether_mobs.lua b/yl_nether_mobs.lua
index cf95e90..1864728 100644
--- a/yl_nether_mobs.lua
+++ b/yl_nether_mobs.lua
@@ -1,11 +1,13 @@
 local max_any_in_area = 6
 local max_in_area_radius = 8
+local positions_per_mapblock = 32
 
 spawnit.register({
 	entity_name = "yl_nether_mobs:blaze",
 	groups = { monster = 1 },
 	chance = 15.3 * 2,
 	cluster = 4,
+	positions_per_mapblock = positions_per_mapblock,
 	on = { "nether:lava_crust" },
 	min_y = nether.DEPTH_FLOOR,
 	max_y = nether.DEPTH_CEILING,
@@ -20,6 +22,7 @@ spawnit.register({
 	groups = { monster = 1 },
 	chance = 13.7 * 2,
 	cluster = 4,
+	positions_per_mapblock = positions_per_mapblock,
 	on = { "nether:rack_deep", "nether:rack" },
 	min_y = nether.DEPTH_FLOOR,
 	max_y = nether.DEPTH_CEILING,
@@ -34,6 +37,7 @@ spawnit.register({
 	groups = { monster = 1 },
 	chance = 13.3 * 2,
 	cluster = 5,
+	positions_per_mapblock = positions_per_mapblock,
 	on = { "nether:rack_deep", "nether:rack" },
 	min_y = nether.DEPTH_FLOOR,
 	max_y = nether.DEPTH_CEILING,
@@ -48,6 +52,7 @@ spawnit.register({
 	groups = { monster = 1 },
 	chance = 12.7 * 2,
 	cluster = 3,
+	positions_per_mapblock = positions_per_mapblock,
 	on = { "nether:rack_deep", "nether:rack" },
 	min_y = nether.DEPTH_FLOOR,
 	max_y = nether.DEPTH_CEILING,
@@ -62,6 +67,7 @@ spawnit.register({
 	groups = { monster = 1 },
 	chance = 20.1 * 2,
 	cluster = 6,
+	positions_per_mapblock = positions_per_mapblock,
 	on = { "nether:rack", "nether:sand", "nether:basalt", "nether:rack_deep" },
 	min_y = nether.DEPTH_FLOOR,
 	max_y = nether.DEPTH_CEILING,
@@ -76,6 +82,7 @@ spawnit.register({
 	groups = { monster = 1 },
 	chance = 27.3,
 	cluster = 3,
+	positions_per_mapblock = positions_per_mapblock,
 	on = {
 		"nether:rack",
 		"nether:sand",
@@ -96,6 +103,7 @@ spawnit.register({
 	groups = { monster = 1 },
 	chance = 20.3,
 	cluster = 5,
+	positions_per_mapblock = positions_per_mapblock,
 	on = { "nether:rack_deep", "yl_nether:rack_deep_with_electrum", "yl_nether:rack_deep_with_electrumite" },
 	min_y = nether.DEPTH_FLOOR,
 	max_y = nether.DEPTH_CEILING,
@@ -110,6 +118,7 @@ spawnit.register({
 	groups = { monster = 1 },
 	chance = 25.7,
 	cluster = 2,
+	positions_per_mapblock = positions_per_mapblock,
 	on = { "nether:rack", "nether:sand", "nether:rack_deep", "nether:lava_crust" },
 	min_y = nether.DEPTH_FLOOR,
 	max_y = nether.DEPTH_CEILING,