v2.2.0: crystal balance tweaks:

- guardian damage down by 13.3%
- 1 fewer wisp spawns on level start
- wisp respawn delay increased by 50%

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/CrystalGuardian.java

@@ -84,7 +84,7 @@ public class CrystalGuardian extends Mob{
 
 	@Override
 	public int damageRoll() {
-		return Random.NormalIntRange( 10, 20 );
+		return Random.NormalIntRange( 10, 16 );
 	}
 
 	@Override

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/MiningLevel.java

@@ -136,6 +136,12 @@ public class MiningLevel extends CavesLevel {
 				.setGrass(Blacksmith.Quest.Type() == Blacksmith.Quest.FUNGI ? 0.65f : 0.10f, 3);
 	}
 
+	@Override
+	public int mobLimit() {
+		//1 fewer than usual
+		return super.mobLimit()-1;
+	}
+
 	@Override
 	public Mob createMob() {
 		switch (Blacksmith.Quest.Type()){
@@ -152,8 +158,8 @@ public class MiningLevel extends CavesLevel {
 
 	@Override
 	public float respawnCooldown() {
-		//normal enemies respawn more slowly here
-		return 2*TIME_TO_RESPAWN;
+		//normal enemies respawn much more slowly here
+		return 3*TIME_TO_RESPAWN;
 	}
 
 	@Override