communications durig RIT deployment

While we are rewriting SOG's, the inevitable debates hold things up, for some things there just is no clear cut answer and each side can make a good case for their argument. Our main debate has been over how to handle communications in relation to radio channels if a RIT gets deployed because it now becomes 2 operations, the original fire, and the new FF rescue. If it is anything other than a quick rescue, it will take some airtime, especially if communicating with the lost/hurt FF. We all know the original fire takes airtime. It would be hard to move radio channels mid-stream. Does anyone have input or ideas on how they think it best to handle this. I know there is no one pat answer, too many variables, but just looking for some more things to consider.