Using Neodymium Magnets as wire connectors?
I would use a method that does not rely on the magnet as a conductor. Use the magnet to hold a conductor against another. This brings a number of advantages that result from isolating the requirements of conductive connector components from the properties of the magnet. This eliminates the need for coating a magnet with gold, much easier to coat the contact itself. Magnets tend to be fragile, and the conductor can be very slightly sprung; enough to soften impacts (which also cause de-magnetisation if I'm correct) and may help with connection reliability. 

Otherwise, I would still use a simple mechanical method for connecting to a magnet. For example, wedge a wire between the magnet and enclosure. Very low cost to implement. It may even be stronger than any soldering/welding technique since some coatings on magnets have quite a weak bond.