I spent a week with Veronica Cass last year and she is a very small operation that sells mostly to large photo labs and professional retouchers. She has a classroom in her facility and teaches 10-15 people at a time. In my opinion her products are the best I've seen.
I use mauve for almost everything and occasionally use midnight. For selenium and sepia toned prints I use browntone. Just order the 5 oz bottles seperately and they'll last a long time.
On negatives I use only mauve.
I use the wet/dry brush method and use the dyes undiluted, one drop/one drop of distilled water and one drop/two drops of distilled water.
Hope this helps,