Knowing how to finish a map is far more important than being able to place statics neatly. We have people in the team who can do the static stuff. I myself am just that guy who can do terrain and place statics, hitmaker is the dev I work with in order to finish the map we are working on. And very recently TS4ever started up a co-work project in a very similar fashion. This is a good way to divide the workload and avoid getting burned out.
From my personal experience, not only does it let each of the participants to fully focus on their own tasks, but they can also inspire each other to work more. Planning and doing things together is not only productive but also helluva fun as long as you are at the same wave length with each other about what you are after with your map.