The term "more lamebrained" implies a sense of ignorance, stupidity or lack of intelligence. However, when looking for antonyms to this phrase, one might use words such as "intelligent", "smart", "clever" or "knowledgeable". These words all suggest a higher level of intellectual capacity and ability to make informed decisions.
Alternatives could be "wise", "astute", "shrewd" or "sagacious", all of which depict a person with good judgement and critical thinking skills. An antonym for "more lamebrained" could also be "sensible", "practical" or "logical", indicating an individual who is guided by reason and common sense. Overall, these antonyms highlight the opposite of the negative connotations associated with the term "lamebrained".