Authors CurseForge

Quote from Galvin

Is there something I can do to force events to happen in the correct order?

Nope.

Take a look at this thread though, different problem, but same technique can be employed:

http://forums.wowace.com/showthread.php?t=19559

This is the basic concept (dry coded), you could implement it a million different ways depending on the needs:

local _cache = {}
local function cleu_handler(...)
   if event == SPELL_DAMAGE or event == SPELL_ENERGIZE then
      local cache = _cache[sourceName]
      if cache then
         if cache == SPELL_DAMAGE and event == SPELL_ENERGIZE then
            --SPELL_ENERGIZE after SPELL_DAMAGE
            _cache[sourceName] = nil
         elseif cache == SPELL_ENERGIZE and event == SPELL_DAMAGE then
            --SPELL_DAMAGE after SPELL_ENERGIZE
            _cache[sourceName] = nil
         else
            --you probably got two of the same event in a row
         end
      else
         _cache[sourceName] = event
      end
   else
      --some other event, may need to remove cache depending on logic
      _cache[sourceName] = nil
   end
end

The logic regarding when to clear the last cache value, or for how long to keep it is entirely dependent on what you're trying to accomplish and how the events come in.