I know that Duke previously required all of your testing history but as I look through the website it doesn’t mention that anymore. It seems as if they will take either the SAT with subject tests or ACT with writing of your choice of testing date… Also, Duke will consider the highest scores you receive in each subsection but not recalculate the composite.
Yes Duke allows score choice now. This is a new policy change since last year. It has been confirmed with admissions staff.