I'm not an A320 guru, but I've been flying the airplane for almost three years now, and besides, I don't think your situation is necessarily A320-specific.
If we have a "large, perceptible amount of smoke" on the flight deck, getting the silly thing on the ground is Priority One and really Priority Only. Checklist compliance quickly becomes a moot point, if the airplane burns up around you while you're trying to run it.
So, my "gem of wisdom" would be to head for the nearest suitable runway, and do the best you can with the checklist. If there is enough smoke, I may not be able to cross-confirm anything anyway.