Nah. Automatic self regulating controls. Engineer the thing to manage everything. Absorbing heat to a controlled point, rejecting it beyond a given point. Below 180F it goes to the rad cooler, above the auxiliary gets put in line.
How much more cool can you get than that?? You can sit in the driver seat and imagine all those mechanisms just switching in and out as needed ..or not needed.
It's kinda like a mechanical ant colony .....