Glutamine is worthless for BB, it's decent for digestion & other health issues. Like I mentioned protein isn't necessary. Waxy maize as well, any carb source will be fine pre-wo.
Beta-Alanine(this is a toss up, but apparently it's the "2nd coming" of creatine. But myself & other people are enjoying the benefits of it.)
Whey(if you can't get enough protein from your diet).
That's it for staples.