First. . . No supplement or combination of supplements makes one immune to consuming lots of alcohol on a daily or near daily basis.
One large lifestyle study did suggest heavy drinkers who drink three cups of coffee a day are 75% less likely to develop cirrhosis of the liver. But lifestyle studies aren't good at establishing causality. Did people disinclined to drink coffee tend to have more vulnerable livers as opposed to coffee providing a protective effect? Those important things don't come up in lifestyle studies.
Next big thing, by manufacturing labeling among many other sources, if you drink daily don't use acetaminophen.
Thiamine and other nutrients are important. If one is drinking so much that they never have a solid stool, its likely that they are heading towards numerous malabsorbtion based nutritional deficiencies. Along with thiamine, I'd mention magnesium as a special concern in the nutritional anxieties about someone who perpetually over indulges in alcohol. But that's just one concern among thousands.