Final answer:
Commanders should assign crew members based on proficiency and capability to ensure effective team operation.
Step-by-step explanation:
When battle-rostering crews, commanders should ensure diversity in crew experience to create the most effective teams. Assigning based on proficiency and capability is generally recognized as the best approach, as it allows for the most appropriate distribution of expertise and skills across various tasks and challenges that may arise. It is important to create a balance within teams, fostering an environment of growth for less experienced members while relying on the expertise of more seasoned individuals.