--- slave-rift-base/src/Game/Run.php	2026-10-31 17:18:00.000000000 +0000
+++ slave-rift-workspace/src/Game/Run.php	2026-10-31 17:22:50.512711050 +0000
@@ -460,11 +460,32 @@
 
     private function chooseEnemyType(): string
     {
+        $weights = self::enemyWeightsForWave($this->wave);
         $roll = $this->random();
-        $type = $this->wave >= 2 && $roll < 0.14 ? 'enforcer'
-            : ($this->wave >= 3 && $roll < 0.30 ? 'brute' : ($roll < 0.58 ? 'runner' : 'guardian'));
-        if ($this->wave % 4 === 0 && $this->remaining % 4 === 0) $type = 'brute';
-        return $type;
+        $cursor = 0.0;
+        foreach ($weights as $type => $weight) {
+            $cursor += $weight;
+            if ($roll <= $cursor) return $type;
+        }
+        return 'brute';
+    }
+
+    /**
+     * Four durability classes, progressively weighted toward tougher enemies.
+     * Weapon DPS still grows faster than enemy health through DifficultyDirector;
+     * this changes composition, not the underlying elasticity rule.
+     *
+     * @return array{runner:float,guardian:float,enforcer:float,brute:float}
+     */
+    public static function enemyWeightsForWave(int $wave): array
+    {
+        return match (true) {
+            $wave <= 1 => ['runner' => 0.68, 'guardian' => 0.32, 'enforcer' => 0.00, 'brute' => 0.00],
+            $wave <= 3 => ['runner' => 0.54, 'guardian' => 0.34, 'enforcer' => 0.12, 'brute' => 0.00],
+            $wave <= 6 => ['runner' => 0.42, 'guardian' => 0.34, 'enforcer' => 0.18, 'brute' => 0.06],
+            $wave <= 10 => ['runner' => 0.32, 'guardian' => 0.33, 'enforcer' => 0.23, 'brute' => 0.12],
+            default => ['runner' => 0.22, 'guardian' => 0.30, 'enforcer' => 0.28, 'brute' => 0.20],
+        };
     }
 
     private function enemyRadius(string $type): float
@@ -495,10 +516,10 @@
     private function spawnEnemyAt(float $x, float $y, float $z, string $type): bool
     {
         [$hp, $speed, $damage, $radius] = match ($type) {
-            'runner' => [24, 2.05, 7, 0.23],
-            'brute' => [135, 0.85, 18, 0.40],
-            'enforcer' => [48, 1.0, 6, 0.27],
-            default => [48, 1.25, 10, 0.30],
+            'runner' => [24, 2.08, 7, 0.23],
+            'brute' => [180, 0.84, 20, 0.40],
+            'enforcer' => [74, 1.02, 8, 0.27],
+            default => [52, 1.25, 10, 0.30],
         };
         $hp = (int)round($hp * (1 + min(20, $this->wave - 1) * 0.07));
         $id = $this->nextId++;