Good luck with all that....There shouldn't even be debates..Candidates should win on their own merits, without tearing down the others. All debates do is to force candidates to attack the others, it is counter-productive.
Substantive debate means you are elucidating your own thoughts on issues. Attacking others is not substantive.
In my opinion FWIW, both Rand & Marco are not known as flame throwers. Both have good command of the issues. I have listened to Rubio’s long speeches in the US senate. He is the most eloquent republican in a long time. Paul has more common sense and a rock solid spine than most.
Let us hope there will be no circular firing squad in 2016 primaries. Otherwise say hello to president Hillary.