The antonyms for the phrase "art of advantage" refer to actions or situations that do not lead to any gain or benefit. These include acts of disadvantage, harm, or loss. The opposite of the art of advantage is the lack of strategy or planning. Inaction, procrastination, and impulsiveness can also be antonyms for the art of advantage. Moreover, dishonesty, deceit, and underhanded tactics lead to negative consequences and are antonyms for the art of advantage. Finally, the absence of skills, knowledge, or resources is another antonym for the art of advantage. In conclusion, the antonyms of the art of advantage encompass negative and ineffective ways of achieving goals.