Both of those orchestrations will work for sure.

Smart agent to orchestrate cheaper agents for labour.

Dumber agents to be very explicit about asking smarter agents for requests that require deep information.

This is a thing - the SOTA models really light up the more information you can provide them, and humans are too lazy / incapable of doing that in every prompt.

Entirely depends on what you are trying to do.

Edit: you can also use a smart agent to ask another smart agent, obviously, which is good for personal workflows.