My team goes back and forth between having each member doing individual stories, then getting together to quickly close big projects by scheduling all the stori

My team goes back and forth between having each member doing individual stories, then getting together to quickly close big projects by scheduling all the stories in parallel. Everyone enjoys the big parallel work, but it's really hard to set up projects to do that, and also deprioritize other items so we can focus. We have a giant surface area though, so one stream per person is as few streams as we can manage most of the time