Having trouble with the extending the Leaderboard to show 2 group ranks and kills&deaths?

A leaderboard can be formed by making a folder/model called leaderstats, as a child of a player. We can connect to the player by using the PlayerAdded Method. We will then create a new folder, called leaderstats, and add the necesery values.

First, we need to connect to the player.

game.Players.PlayerAdded:Connect(function(plr)
    -- we will continue the code here
end)

Now that we have connected to a player that just joined, we will want to make the leaderstats folder.

local leaderstats = Instance.new("Folder") -- creates the folder
leaderstats.Parent = plr -- places it as a child of the player
leaderstats.Name = "leaderstats" -- names the folder

Now that we have the leaderstats folder, we will need the values. Let's begin with the deaths!

local deaths = Instance.new("IntValue") -- creates the integer value
deaths.Parent = leaderstats -- places it as a child of leaderstats
deaths.Name = "Deaths" -- names the value
if plr.Character then -- if the player has a character
    plr.Character.Humanoid.Died:Connect(function() -- if the character died
        deaths.Value = deaths.Value+1 -- adds 1 more death to the value
    end
end

Now that we have the Deaths value, let's get into the kills value! Unfortunately, the kills value will only work if there is a remote event, and I will not be covering that.

local kills = Instance.new("IntValue") -- creates the value
kills.Parent = leaderstats -- places the value as a child of leaderstats
kills.Name = "Kills" -- names the value

Now that we have the Deaths and the kills values, let's move onto the group roles! Let's start with Group1

local group1 = Instance.new("IntValue") -- creates the value for group1
group1.Name = "Group1" -- CHANGE "Group1" TO YOUR GROUP NAME
group1.Parent = leaderstats
group1.Value = plr:GetRoleInGruop(Group1) -- CHANGE "Group1" TO YOUR GROUP ID

Not let's move onto Group2

local group2 = Instance.new("IntValue") -- creates the value for group1
group2.Name = "Group2" -- CHANGE "Group2" TO YOUR GROUP NAME
group2.Parent = leaderstats
group2.Value = plr:GetRoleInGroup(Group2) -- CHANGE "Group2" TO YOUR GROUP ID

That's it, we are done!

Here's our finished work!

game.Players.PlayerAdded:Connect(function(plr)
    -- leaderstats
    local leaderstats = Instance.new("Folder") -- creates the folder
    leaderstats.Parent = plr -- places it as a child of the player
    leaderstats.Name = "leaderstats" -- names the folder    

    --Deaths
    local deaths = Instance.new("IntValue") -- creates the integer value
    deaths.Parent = leaderstats -- places it as a child of leaderstats
    deaths.Name = "Deaths" -- names the value
    if plr.Character then -- if the player has a character
        plr.Character.Humanoid.Died:Connect(function() -- if the character died
            deaths.Value = deaths.Value+1 -- adds 1 more death to the value
        end
    end

    --Group1
    local group1 = Instance.new("IntValue") -- creates the value for group1
    group1.Name = "Group1" -- CHANGE "Group1" TO YOUR GROUP NAME
    group1.Parent = leaderstats
    group1.Value = plr:GetRoleInGroup(Group1) -- CHANGE "Group1" TO YOUR GROUP ID

    --Group2
    local group2 = Instance.new("IntValue") -- creates the value for group1
group2.Name = "Group2" -- CHANGE "Group2" TO YOUR GROUP NAME
group2.Parent = leaderstats
group2.Value = plr:GetRoleInGroup(Group2) -- CHANGE "Group2" TO YOUR GROUP ID

end)