I tend to agree that in that situation the choice of landing area would probably not include an appraisal of much beyond the actual landing of the aircraft. Part of even a hurried landing will be a call to control by the TFO to specify the location and nature of the landing and any assistance required.
The drill for CAD failure is to switch off the power to the CAD, this may re-set it, if not, then monitor the VEMD pages for cautions. Implicit would be the fact that cautions such as Fuel QTY Degrade/Fail will not be availible so the flight time and clock would be used to calculate time remaining. The TFO will assist the pilot by reading out the relevant pages of the emergency checklist as required.