I use the parallel station setting for my garden’s drip system. All other stations are set to sequential. The garden is on one schedule and all the others are on another.
On the days that the two schedules overlap, the garden station and one of the others is on at the same time. Or it will be when I turn the water on for the season.
so as not to hijack this thread, I’ll ask about possible issues with overlapping stations elswhere.