There are several antonyms for the phrase "doth over," which means to excessively or overly do something. One antonym would be "underdo," which means to do something insufficiently. Another antonym would be "balance," which means to do something in a reasonable and moderate way. "Restrain" is another antonym as it implies holding back or limiting an action. "Moderate," "controlled," and "tempered" are a few more antonyms for "doth over" that suggest a more tempered approach to whatever task is at hand. It's important to strike a balance in all aspects of life, including work, play, and personal relationships.