Alt, Ast and Alp. But your liver does many things including
synthesis and excretory functions. It is these functions that tell you how your liver is really doing, health wise.
Your liver enzymes simply let you know if your liver is troubled, within the last several days. They do not indicate your liver's overall health. It is the synthesis and excretory functions that do that. So the numbers of interest are the: bilirubin, albumin, albumin/globulin ratio (A/G), platelet count, etc ...