Is there a way to distribute duration across a series of tasks that all have the same predecessor?

Here is the scenario. I have 10 tasks all assigned to the same person. Each task has 2 days duration / 12 hours (6 hour day is my default). The tasks also have the same predecessor, so they all have the same planned completion date based on that shared predecessor.

Since they are all assigned to the same person and have the same due date, effectively the tasks pack 20 days’ work into only 2 days. The tasks will very quickly start showing as late.

Two ways I have previously solved this problem:
1. Make each of the tasks dependent on completing one another. Creates a hierarchy and distributes the time, but my end users want to be able to choose where to start on the tasks.

2. Add artificially increasing durations so that the first task lasts 2 days, the second 4 days, etc. This includes the full time, but my end users don’t like inaccuracy of the durations.

Is there some way to have Workfront treat these tasks as if they were one task and set a due date that is realistic for the group of tasks without my having to make artificial changes ?