diff --git a/src/world/Math/CalcStats.cpp b/src/world/Math/CalcStats.cpp
index 3e51ae26..e66764a7 100644
--- a/src/world/Math/CalcStats.cpp
+++ b/src/world/Math/CalcStats.cpp
@@ -414,4 +414,36 @@ float CalcStats::criticalHitBonus( const Sapphire::Entity::Chara& chara )
   auto divVal = static_cast< float >( levelTable[ level ][ Common::LevelTableEntry::DIV ] );
 
   return std::floor( 200.f * ( baseStats.critHitRate - subVal ) / divVal + 1400.f ) / 1000.f;
+}
+
+float CalcStats::physicalDefence( const Sapphire::Entity::Chara& chara )
+{
+  auto level = chara.getLevel();
+  const auto& baseStats = chara.getStats();
+
+  auto divVal = static_cast< float >( levelTable[ level ][ Common::LevelTableEntry::DIV ] );
+
+  return std::floor( 15.f * baseStats.defense ) / 100.f;
+}
+
+float CalcStats::magicDefence( const Sapphire::Entity::Chara& chara )
+{
+  auto level = chara.getLevel();
+  const auto& baseStats = chara.getStats();
+
+  auto divVal = static_cast< float >( levelTable[ level ][ Common::LevelTableEntry::DIV ] );
+
+  return std::floor( 15.f * baseStats.magicDefense ) / 100.f;
+}
+
+float CalcStats::blockStrength( const Sapphire::Entity::Chara& chara )
+{
+
+}
+
+float CalcStats::healingMagicPotency( const Sapphire::Entity::Chara& chara )
+{
+  const auto& baseStats = chara.getStats();
+
+  return std::floor( 100.f * ( baseStats.healingPotMagic - 292.f ) / 264.f + 100.f ) / 100.f;
 }
\ No newline at end of file
diff --git a/src/world/Math/CalcStats.h b/src/world/Math/CalcStats.h
index a7078f6c..6aab838d 100644
--- a/src/world/Math/CalcStats.h
+++ b/src/world/Math/CalcStats.h
@@ -18,6 +18,7 @@ namespace Sapphire::Math
 
     /*!
      * @brief Calculates the MP cost of a spell given its base cost
+     *
      * @param chara The Chara that is casting the action
      * @param baseCost The action cost
      * @return The total MP to be consumed by a successful cast
@@ -26,61 +27,61 @@ namespace Sapphire::Math
 
     /*!
      * @brief Calculates the probability of a block happening
-     * @return
      */
     static float blockProbability( const Sapphire::Entity::Chara& chara );
 
     /*!
      * @brief Calculates the probability of a direct hit happening
-     * @return
      */
     static float directHitProbability( const Sapphire::Entity::Chara& chara );
 
     /*!
      * @brief Calculates the probability of a critical hit happening
-     * @return
      */
     static float criticalHitProbability( const Sapphire::Entity::Chara& chara );
 
     /*!
      * @brief Calculates the contribution of potency to damage output.
+     *
      * @param potency The action potency
-     * @return
      */
     static float potency( uint16_t potency );
 
     /*!
      * @brief Weapon damage is the contribution the weapon's damage rating
+     *
      * @param chara The source/casting character.
      * @param weaponDamage the weapons physical or magic damage
      * @param isMagicDamage true if the damage is magical, otherwise it's treated as physical damage
-     * @return
      */
     static float weaponDamage( const Sapphire::Entity::Chara& chara, float weaponDamage, bool isMagicDamage );
 
     /*!
      * @brief Calculates the contribution of physical attack power to damage dealt
+     * @todo Only works at level 70
+     *
      * @param chara The source/casting character.
-     * @return
      */
     static float attackPower( const Sapphire::Entity::Chara& chara );
 
     /*!
      * @brief Calculates the contribution of magical attack power to damage dealt
+     * @todo Only works at level 70
+     *
      * @param chara The source/casting character.
-     * @return
      */
     static float magicAttackPower( const Sapphire::Entity::Chara& chara );
 
     /*!
      * @brief Calculates the contribution of healing magic power to healing dealt
+     *
      * @param chara The source/casting character.
-     * @return
      */
     static float healingMagicPower( const Sapphire::Entity::Chara& chara );
 
     /*!
      * @brief Calculates determinations contribution to damage and healing output.
+     *
      * @param chara The source/casting character.
      * @return Returns a rational number rounded to 3 decimal places.
      */
@@ -88,6 +89,7 @@ namespace Sapphire::Math
 
     /*!
      * @brief Calculates the tenacity contribution to damage, mitigation and healing.
+     *
      * @param chara The source/casting character.
      * @return Returns a rational number rounded to 3 decimal places.
      */
@@ -95,28 +97,58 @@ namespace Sapphire::Math
 
     /*!
      * @brief Calculates the bonus granted by either spell speed or skill speed depending on the casters classjob.
+     *
      * @param chara The source/casting character.
-     * @return
      */
     static float speed( const Sapphire::Entity::Chara& chara );
 
     /*!
      * @brief Calculates the amount of bonus damaged applied on a critical hit
-     * @param chara
-     * @return
+     * @note Called Critical Hit Rate in the TJ document but I think that name is a bit too ambiguous - f(CHR)
+     *
+     * @param chara The source/casting character.
      */
     static float criticalHitBonus( const Sapphire::Entity::Chara& chara );
 
-    static float physicalDefense( const Sapphire::Entity::Chara& chara );
+    /*!
+     * @brief Calculates how much damage you mitigate via physical defence
+     *
+     * @param chara The source/casting character.
+     */
+    static float physicalDefence( const Sapphire::Entity::Chara& chara );
 
-    static float magicDefense( const Sapphire::Entity::Chara& chara );
+    /*!
+     * @brief Calculates how much damage you mitigate via magical defence
+     *
+     * @param chara The source/casting character.
+     */
+    static float magicDefence( const Sapphire::Entity::Chara& chara );
 
+    /*!
+     * @brief Calculates the percentage of damage that is mitigated on a successful block
+     *
+     * @param chara The source/casting character.
+     */
     static float blockStrength( const Sapphire::Entity::Chara& chara );
 
+    /*!
+     * @brief Calculates the multiplier that healing magic potency affects healing output
+     *
+     * @todo Only works for level 70
+     *
+     * @param chara The source/casting character.
+     */
+    static float healingMagicPotency( const Sapphire::Entity::Chara& chara );
+
   private:
 
     static uint32_t getPrimaryClassJobAttribute( const Sapphire::Entity::Chara& chara );
 
+    /*!
+     * @brief Has the main attack power calculation allowing for de-duplication of functions.
+     *
+     * @param attackPower The magic/physical attack power value.
+     */
     static float calcAttackPower( uint32_t attackPower );
 
   };