The phrase "made top of head" refers to something that is done without planning or careful consideration, often spur of the moment. Antonyms for this phrase might include "strategy," "planning," or "deliberation." These words all suggest a more thoughtful approach to decision-making, in which careful consideration is given to the best course of action. Other possible antonyms might include "precision," "methodical," or "thorough," which all suggest a more detailed and organized approach to getting things done. Ultimately, the choice of antonym will depend on the specific context in which the phrase "made top of head" is being used, and the particular meaning that is being conveyed.