Using eager loading in GenerateTournamentMatches and AdvanceWrestler, generating/manipulating in-memory, and doing a single bulk insert or update at the end.

app/services/school_services/calculate_school_score.rb

@@ -0,0 +1,55 @@
+class CalculateSchoolScore
+  def initialize(school)
+    @school = school
+  end
+
+  def calculate
+    school = preload_school_context
+    score = calculate_score_value(school)
+    persist_school_score(school.id, score)
+    score
+  end
+
+  def calculate_value
+    school = preload_school_context
+    calculate_score_value(school)
+  end
+
+  private
+
+  def preload_school_context
+    School
+      .includes(
+        :deductedPoints,
+        wrestlers: [
+          :deductedPoints,
+          { matches_as_w1: :winner },
+          { matches_as_w2: :winner },
+          { weight: [:matches, { tournament: { weights: :wrestlers } }] }
+        ]
+      )
+      .find(@school.id)
+  end
+
+  def calculate_score_value(school)
+    total_points_scored_by_wrestlers(school) - total_points_deducted(school)
+  end
+
+  def total_points_scored_by_wrestlers(school)
+    school.wrestlers.sum { |wrestler| CalculateWrestlerTeamScore.new(wrestler).totalScore }
+  end
+
+  def total_points_deducted(school)
+    school.deductedPoints.sum(&:points)
+  end
+
+  def persist_school_score(school_id, score)
+    School.upsert_all([
+      {
+        id: school_id,
+        score: score,
+        updated_at: Time.current
+      }
+    ])
+  end
+end