new ATR vs DEF formula for spells

src/engine/gameManager/PowersManager.java

@@ -2329,17 +2329,11 @@ public enum PowersManager {
             ChatManager.chatSystemInfo(pc, smsg);
         }
 
-        int chance;
-
-        if (atr > defense || defense == 0)
-            chance = 94;
-        else {
-            float dif = atr / defense;
-            if (dif <= 0.8f)
-                chance = 4;
-            else
-                chance = ((int) (450 * (dif - 0.8f)) + 4);
-        }
+        float constant = (atr+defense)*0.315f;
+        float atrChance = atr - constant;
+        float defChance = defense - constant + atrChance;
+        float smallChance = atrChance/defChance;
+        int chance = (int)(smallChance * 100);
 
         // calculate hit/miss
         int roll = ThreadLocalRandom.current().nextInt(100);