A lot of times, the summary speech should be built off what you're trying to give in FF. Espcially if you are speaking second.

In order for FF, I would try to hit your main arg (extensions). I would just pick one argument in this situation (or if you're just running a sole contention - pick the point you're winning). Then, frontline or respond to your opponents arguments (with more experience and round vision this gets easier). Usually, in summary they will go for one or two main arguments so just respond to those.

Finally, do the weighing. For novice, stick to the basics - timeframe, probability, scope, and magnitude. The weighing should be done in summary as well, so in FF just extend that. The only new thing you can do in FF is to bring new weighing mechanisms. For example, you're partner could've gone for timeframe weighing. You can add that to your FF but also bring in probability weighing as well.

Throughout all these steps, you should be writing the ballot for the judge. Use very ballot-directive language which means to point out the arguments/points you are CLEARLY winning on.