I think you should just do the NB. I know you think you do not have mineral deficiencies but if you are in stage 3 exhaustion I wouldn't be so sure.
I called Lam last year for a free consult. He told me if I had mineral deficiencies his program would not work. That's when I decided to do the NB with Analytical Research Labs. It turned out I was deficient in all but 2 minerals. The NB will reveal a complete snapshot of what is going on in your body and an outlined course of action. If you start throwing lots of extra vitamin c and pantothenic acid into the mix you will be throwing everything off. If you have adrenal fatigue your NB program will include plenty of both in your endo-met supplements. More isn't always better.
I have low adrenals and my supplements contain plenty of vitamin c and pantothenic acid plus loads of other things to ensure a complete healing of the body.
Healing the body naturally requires rest, patience and a dedication to the diet and supplements. This works but you really have to do your part.