If you’re breaking in a new camshaft then you should definitely exceed 2000 RPM on a reasonably frequent basis. Without that the cam lobes won’t get sufficient oil splash from the crank.
On the other hand the distributor gear needs to wear in its mesh with the camshaft, and having cold oil and elevated RPM greatly increases the load on the gear. So warm up the engine before blipping the throttle repeatedly.
The thing that helps rings to seat is cylinder pressure, which you can only get by operating the engine at wide open throttle. You should just avoid extremely high RPM… if you get the car in second or third gear and then make several (or ten) runs from 1500 to 3000 RPM with the foot to the floor, it will do more to help the rings wear in than 1000 miles of driving like you’ve got an egg between your foot and the throttle pedal.