Disagree with that.
Running r/r at 5 means the first 3 rides are paired with a reserve, hence you go with the 3 strongest in the top 5. On paper, that's Josh, Michele and Kye, leaving Lasse in heat 13.
If necessary (and, admittedly, partly depending on how badly the top 5 are performing), it's also an opportunity to get rid of the weakest reserve's third ride. If Josh does his job, he'll win 13 anyway so take the 3-3 and move on to the next race.