The phrase "more overkill" signifies an excessive or unnecessary amount of something. To provide an antonym for this phrase, one must consider words that convey the opposite meaning. Some possible antonyms for "more overkill" could include words such as "minimal," "adequate," "moderate," "sufficient," or "suitable." These words suggest the idea of having just enough, as opposed to using an excessive amount of something. By choosing these antonyms, one can convey a sense of balance and restraint, rather than overwhelming excess. Using antonyms such as these can help create a more nuanced and balanced communication.