[shaman] disable DS/DR

Author: HawkCorrigan

engine/class_modules/sc_shaman.cpp

@@ -2037,6 +2037,7 @@ struct shaman_t : public parse_player_effects_t
   void init_uptimes() override;
   void init_assessors() override;
   void init_rng() override;
+  bool validate_fight_style( fight_style_e style ) const override;
   void init_items() override;
   void init_special_effects() override;
   void init_finished() override;
@@ -13132,6 +13133,24 @@ void shaman_t::summon_lesser_elemental( elemental type, timespan_t override_dura
   }
 }
 
+// shaman_t::validate_fight_style ==========================================
+bool shaman_t::validate_fight_style( fight_style_e style ) const
+{
+  if ( specialization() == SHAMAN_ELEMENTAL )
+  {
+    switch ( style )
+    {
+      case FIGHT_STYLE_DUNGEON_ROUTE:
+      case FIGHT_STYLE_DUNGEON_SLICE:
+        return false;
+      default:
+        return true;
+    }
+  }
+
+  return true;
+}
+
 // ==========================================================================
 // Shaman Tracking - code blocks that shall not be doublicated
 // ==========================================================================