Cambria has become a generic trade name for various kinds of Oncidium intergeneric hybrids. Detailed culture for these should be easily found.

The plant has obviously become very dehydrated over time. If the roots are healthy (firm, white or tan, not empty, squishy or brown) then it has been regularly underwatered. Pseudobulbs that are brown rather than green probably can't be saved, but any green tissue will probably live and give rise to healthy new growth if proper care is given.

Any roots that are alive are worth saving, so keep trimming of live roots to a minimum. Any that are dead should be removed. I wouldn't divide the plant at this point. Let it recover first.

Potting in a bark mix is probably the best bet. Vandas are sometimes grown in empty glass vases with no media, but this probably isn't a good choice for Oncidium types with their finer roots, or Phals that generally want more even moisture.