This was figured out a while ago and has been posted about more than enough times for a simple search to find the information. Before you try posting about your "latest and greatest" find, try using the search function.
As stated in my last WWS, frost trap procs LnL off raid bosses AND is on a seperate CD as serpent sting procs. I just noticed that proccing LnL from frost traps has NO CD. So you can spec resourcefulness, get a LnL every 24 secs, and a chance to proc it between those 24s with serpent sting.