The antonyms for the phrase "asked advice of" could be "ignored advice," "disregarded counsel," "chose independently," or "made a unilateral decision." These antonyms suggest a different approach to decision-making, indicating a lack of consultation or consideration of outside opinions. While seeking advice can be beneficial, there are times when it is appropriate to make a decision without consulting others. However, it is important to weigh the benefits of seeking advice against the drawbacks of ignoring it. Ultimately, the choice of whether or not to ask advice should depend on the specific situation and individual preferences.