Easy. Don’t have “moderators” ask questions. Have the participants pose questions and respond amongst themselves.
Or have a moderator from each side. I think a debate moderated by Tucker Carlson and Bill Maher would get ratings.
Mike Wallace may have a few pointers if you can find him.
Pretty much my thoughts.
Each candidate would provide half the questions.
A time keeper would ask the question alternating between the two parties.
A timer light would indicate when the candidate was running out of time.
The candidate/s mike would be cut when he was out of time.
I think having the candidate select the question would provide a more illuminating and lively debate.
This would also make it less likely that one candidate would get the questions before the debate as happened with Hillary vs. Trump.
The moderator need only get the questions the day of the event.