because rotors and spray heads need to run for differant lengths of time it is always a bad idea to mix the types. the better solution for your system is to change the spray head nozzels to a low flow type like the MP rotator then increase your run times.

mike1059 is right. Rotors and pop-ups should not be mixed. You can easily switch out sprinkler nozzles or replace the sprinkler heads.

Here is a link that might be useful: Pop-up sprinklers