This depends on what you’re mainly riding. Some riders may prefer the feel of a coil but we prefer an air shock. The air shock will feel more bottomless and is easier to set up on such a heavy bike. Even with volume spacers the air shock does not feel harsh at the end of travel.
Setting up your shock at 30% sag will provide more bottom out resistance than the stock link. You can run closer to 27% sag for better bottom out resistance.
Setting up your shock at 30% sag will also provide more small bump sensitivity than the stock link if the damping is properly adjusted, but if you would like more, increase your sag to 32%.