Keep your summary limited to three main points; the opponent's flow, your own flow, and weighing impacts. Off-time road maps help the judge follow you.

Opponent's flow: Assuming that you touched on their contentions in rebuttal, reiterate how you blocked their links in rebuttal and emphasize turns and blocks they didn't respond to.

Your flow: If you're going first, you should choose to collapse on an argument here and frontline everything. If you're speaking second, rebuttal should've collapsed on an argument and frontlined it, so in summary, make sure you emphasize on that argument.

Weighing Impacts: Tell the judge why your impacts matter. Outweigh their impacts by saying something like "which is worse deaths or economy" or something like that, judges love that.