WA Code for missing AB...

AB_Check.lua

function()
  local unit = nil
  local group_type = ""
  local group_size = 0
  if IsInRaid() then
    group_type = "raid"
    group_size = 40
  elseif IsInGroup() then
    group_type = "party"
    group_size = 5
  else
    group_type = "player"
    group_size = 1
    unit = "player"
  end
  
  MISSING_PLAYERS = {}
  for i = 1, group_size do -- For each group member
    if not unit then
      unit = group_type .. i
    end
    -- If this group member exists, is alive, and is in range
    if UnitExists(unit) and not UnitIsDeadOrGhost(unit) and IsSpellInRange("Arcane Brilliance", unit) then
      if not UnitBuff(unit, "Arcane Brilliance") and not UnitBuff(unit, "Dalaran Brilliance") then
        MISSING_PLAYERS[#MISSING_PLAYERS+1] = UnitName(unit)
      end
    end
  end
  if #MISSING_PLAYERS > 0 then
    return true
  else
    return false
  end
end