Optimized code to use GridRoster. GridStatusSmartHealing should be a little less of a resource hog. Also fixed some issues where PlayersInArea was not working, and ChainHealStatus was not working as intended.

diff --git a/GridStatusSmartHealing.lua b/GridStatusSmartHealing.lua
index 7b13636..49f5efb 100644
--- a/GridStatusSmartHealing.lua
+++ b/GridStatusSmartHealing.lua
@@ -137,8 +137,6 @@ function GridStatusSmartHealing:RegisterStatus(module, status, desc, options, in
 end

 function GridStatusSmartHealing:PostInitialize()
-    self.roster = {};
-
     -- Do now so modulePrototype can register Options for modules
     self:InitializeOptions();
 end
@@ -166,10 +164,14 @@ function GridStatusSmartHealing:DoEnable(force)
         return;
     end
     self:Debug("Enabling", self.moduleName);
+    --[[
     self:UpdateRoster();

     self:RegisterEvent("PLAYER_MEMBERS_CHANGED", "UpdateRoster");
     self:RegisterEvent("RAID_ROSTER_UPDATE", "UpdateRoster");
+    ]]
+
+    --GridRoster:RegisterMessage("Grid_RosterUpdated");

     BlankFrame:SetScript("OnUpdate", function(_, timer)
         return self:OnUpdate(timer);
@@ -201,8 +203,6 @@ function GridStatusSmartHealing:DoDisable()
     if (NumEnabled == 0) then
         self:Debug("Disabling", self.moduleName);
         BlankFrame:SetScript("OnUpdate", nil);
-        self:UnregisterEvent("PLAYER_MEMBERS_CHANGED");
-        self:UnregisterEvent("RAID_ROSTER_UPDATE");
     end
 end

@@ -237,35 +237,40 @@ function GridStatusSmartHealing:OnUpdate(elapsed)
             self:UpdateData();
             self:UpdateAll();
         else
+            SetMapToCurrentZone();
             self:Debug("Update Map Failed");
             self:ClearAll();
         end
     end
 end

+function GridStatusSmartHealing:GetUnitInfo(guid)
+    return self.state.data[guid];
+end
+
 function GridStatusSmartHealing:UpdateData()
     self.state.data = {};
     self.state.x = self.state.x * self.state.mapWidth;
     self.state.y = self.state.y * self.state.mapHeight;

-    for i = 1, 8 do
-        for _, unitId in pairs(self.roster[i]) do
-            local unitX, unitY = GetPlayerMapPosition(unitId);
-            if (unitX ~= 0 or unitY ~= 0 and IsValidTarget(unitId)) then
-                local health = UnitHealth(unitId);
-                local maxHealth = UnitHealthMax(unitId);
+    for _guid, _unitId in GridRoster:IterateRoster() do
+        local unitX, unitY = GetPlayerMapPosition(_unitId);

-                self.state.data[unitId] =
-                {
-                    guid = UnitGUID(unitId),
+        if (unitX ~= 0 or unitY ~= 0 and self:IsValidHealTarget(_unitId)) then
+            local health = UnitHealth(_unitId);
+            local maxHealth = UnitHealthMax(_unitId);
+
+            self.state.data[_guid] =
+            {
+                    unitId = _unitId,
+                    guid = _guid,
                     x = unitX * self.state.mapWidth,
                     y = unitY * self.state.mapHeight,
                     health = health,
                     maxHealth = maxHealth,
                     missingHealth = maxHealth - health,
                     percent = maxHealth / health,
-                };
-            end
+            };
         end
     end
 end
@@ -289,7 +294,8 @@ function GridStatusSmartHealing:UpdateMap()
     return false;
 end

-function GridStatusSmartHealing:UpdateRoster()
+--[[ -- Now using GridRoster
+function GridStatusSmartHealing:Grid_RosterUpdated()
     self.roster = { [1] = {}, [2] = {}, [3] = {}, [4] = {}, [5] = {}, [6] = {}, [7] = {}, [8] = {} };

     local RaidMemberNum = GetNumGroupMembers();
@@ -316,6 +322,7 @@ function GridStatusSmartHealing:UpdateRoster()
         end
     end
 end
+]]

 function GridStatusSmartHealing:Enabled(statusModule)
     return statusModule.db.profile.enable;
diff --git a/GridStatusSmartHealing.toc b/GridStatusSmartHealing.toc
index 7a6327c..b437996 100644
--- a/GridStatusSmartHealing.toc
+++ b/GridStatusSmartHealing.toc
@@ -3,7 +3,7 @@
 ## Notes: Adds statuses to grid for best targets for smart heals.
 ## Dependencies: Grid, LibMapData-1.0
 ## Author: Tirds
-## Version: v0.3b
+## Version: v0.3.1
 ## X-GridStatusModule: GridStatusSmartHealing

 GridStatusSmartHealing.lua
diff --git a/status/chainheal.lua b/status/chainheal.lua
index 32d6589..9076d67 100644
--- a/status/chainheal.lua
+++ b/status/chainheal.lua
@@ -1,4 +1,5 @@
 local GridStatus = Grid:GetModule("GridStatus");
+local GridRoster = Grid:GetModule("GridRoster");
 local SmartHealing = GridStatus:GetModule("GridStatusSmartHealing");

 local GridStatusSmartHealing_ChainHeal = SmartHealing:NewModule("GridStatusSmartHealing_ChainHeal", "AceEvent-3.0");
@@ -161,14 +162,11 @@ function GridStatusSmartHealing_ChainHeal:Update()
     -- all players missing health
     local deficits = {};

-    -- find players missing health
-    for i = 1, 8 do
-        for _, unitId in pairs(SmartHealing.roster[i]) do
-            local info = SmartHealing.state.data[unitId];
-            if (info and info.missingHealth > 0 and SmartHealing:IsValidHealTarget(unitId)) then
-                info.unitId = unitId;
-                table.insert(deficits, info);
-            end
+    for guid, unitId in GridRoster:IterateRoster() do
+        local info = SmartHealing:GetUnitInfo(guid);
+        -- if info == nil, probably a pet.
+        if (info ~= nil and unitId and info.missingHealth > 0 and SmartHealing:IsValidHealTarget(unitId)) then
+            table.insert(deficits, info);
         end
     end

@@ -181,7 +179,7 @@ function GridStatusSmartHealing_ChainHeal:Update()
     local paths = {};
     local numDeficits = #deficits;

-    SmartHealing:Debug("NumDeficts", numDeficits);
+    self:Debug("NumDeficts", numDeficits);

     for i = 1, numDeficits do
         local curUnit = deficits[i];
@@ -228,7 +226,7 @@ function GridStatusSmartHealing_ChainHeal:Update()
         return a.totalHeal > b.totalHeal;
     end);

-    SmartHealing:Debug("Paths found: ", #paths);
+    self:Debug("Paths found: ", #paths);

     if (#paths == 0) then
         return;
diff --git a/status/playersinarea.lua b/status/playersinarea.lua
index 25b82e6..5a1dda6 100644
--- a/status/playersinarea.lua
+++ b/status/playersinarea.lua
@@ -1,4 +1,5 @@
 local GridStatus = Grid:GetModule("GridStatus");
+local GridRoster = Grid:GetModule("GridRoster");
 local SmartHealing = GridStatus:GetModule("GridStatusSmartHealing");

 local GridStatusSmartHealing_InArea = SmartHealing:NewModule("GridStatusSmartHealing_InArea", "AceEvent-3.0");
@@ -158,15 +159,11 @@ function GridStatusSmartHealing_InArea:Update()

     local deficits = {};

-    for i = 1, 8 do
-        for _, unitId in pairs(SmartHealing.roster[i]) do
-            local info = SmartHealing.state.data[unitId];
-            if (info and SmartHealing:IsValidHealTarget(unitId)) then
-                if ((Settings.sortMethod == "missingHealth" and info.missingHealth > 0) or Settings.sortMethod == "bestTarget") then
-                    info.unitId = unidId;
-                    table.insert(deficits, info);
-                end
-            end
+    for guid, unitId in GridRoster:IterateRoster() do
+        local info = SmartHealing:GetUnitInfo(guid);
+        -- if info == nil, probably a pet.
+        if (info ~= nil and ((Settings.sortMethod == "missingHealth" and info.missingHealth > 0) or Settings.sortMethod == "bestTarget")) then
+            table.insert(deficits, info);
         end
     end

@@ -203,7 +200,7 @@ function GridStatusSmartHealing_InArea:Update()
         end
     end

-    SmartHealing:Debug("NumTargets", #targets);
+    self:Debug("NumTargets", #targets);

     if (Settings.sortMethod == "missingHealth") then
         table.sort(targets, function(a, b)