Visual Approaches at night in mountanous terrain is not good airmanship. Saving a few minutes of time does not warrant shortcuts.
Every charter company, that was worth a s**t I've flown for, strictly forbids night visual approaches in areas of terrain or areas the crew is unfamiliar with. Part of OM Part A is where the rule usually "lives".
Real simple, instrument approaches, if flown correctly, are foolproof. Enhances safety and takes the "guess work" out of visual approach profiles....in the dark.