Not sure how much that combination is possible; whether some degree of intelligence is not necessary to be able to follow the rules of rationality.
But if it is possible, then “low intelligence + high rationality” would be going in the right direction, just very slowly. Then it would depend on the specific situation, on the distance to the specific goal, whether going slowly one has enough time to reach the goal and benefit from reaching it.
The Millionaire Next Door might be an example of average intelligence, high rationality. These are people who are unusually good at remembering their goal and doing reasonable things to achieve it.
Not sure how much that combination is possible; whether some degree of intelligence is not necessary to be able to follow the rules of rationality.
But if it is possible, then “low intelligence + high rationality” would be going in the right direction, just very slowly. Then it would depend on the specific situation, on the distance to the specific goal, whether going slowly one has enough time to reach the goal and benefit from reaching it.
The Millionaire Next Door might be an example of average intelligence, high rationality. These are people who are unusually good at remembering their goal and doing reasonable things to achieve it.