What is the best process and material for a crown for a bruxer? Gold, zirconium, ceramic, a combination, etc?

I would recommend either zirconia or full gold. However, more important is that the material of the new crown matches the material of the teeth that it opposes (bruxes against). If you are a severe bruxer, and you used zirconia on your new crown, and had natural tooth or a gold crown opposing it, the zirconia would wear down the opposing tooth. Your dentist should be able to make the best recommendations for what material he will use that best serves you.However, very important, is that if you are a bruxer, you should wear a night guard dental appliance to protect against the harmful habit of bruxing.

I would suggest an all zirconium crown if you have the severe wear and load factors on the tooth you describe.

I usually give long-winded answers but this is simple: GOLDGold is literally the gold standard in dentistry, but almost no one wants a gold crown anymore. This is obviously due to aesthetics, and the recent advancements in porcelain/zirconia crowns (not to mention the rise of gold prices over the last 20 years and what that did to the price of gold crowns). That being said, if you don't care what the crown looks like (blasphemy coming from an aesthetic dentist) then gold is the way to go.Your second option is to get what's called a BruxZir crown. This is an all white crown made from Zirconia. It isn't the most aesthetic white crown out there (definitely more aesthetic than gold), but it's the next best choice.