Creatine is fine on off days. Just take is whenever. Go with straight leucine, it's what you want out of the bcaa and you'll pay less for the key ingredient if you get it on its own. As far as glutamate. I'm not really sure.

Many experienced members say glutamine is unnessary when using CBL. You will get plenty of glutamine from the animal protein.Only leucine, creatine and wpi is required.  Optimally the pwo shake also has the ingredients in the book.

Here's something I just got in an email. I want to know opinions before investing into this, since it hits home.http://buildingbrawn.wordpress.com/2012/06/26/benefits-of-glutamine/

Interesting.  I read a couple absracts of studies (didn't have acess to the full study) and this is what I found:http://www.ncbi.nlm.nih.gov/pubmed/8098788  This study shows glycyl-L-glutamine  can prevent detoration of the gut permiability and preserves mucosal structure.  This study used parental nutrition, which from my understanding is nutrition through and IV.http://gut.bmj.com/content/41/4/487.abstract This one uses an animal model.  There were three groups a control with a 20% casein diet, 20% casein + 2% glutamine, and 20% casein + 4% glutamine.  The rats fed glutamine had less inflamation and damage in the colon.There are other studies, but I found these to be the most interesting.  Seems like some pretty legit stuff, but you should consult an expert before you start using it. 

I used to take it off and on.  It always seemed to keep me from getting as sore as I normally would when I didn't take it.  I haven't used it in months but was thinking about adding it back in since I've been pretty sore lately.  Here is a good review of glutamine that pretty much sums up the way I feel about it, no sciency pubmed links or anything, just a good review: http://www.intense-workout.com/l-glutamine.html