I've written a few posts about the Duke applicant and reapplicant process back in the day.
I'll say you can do EA or R1, but I would encourage you to do one of those. EA shows adcom that you're REALLY in this -- no ifs, ands, or buts. However, if you put together a compelling application and apply in R1, you can be admitted as a reapplicant (I reapplied in R1 and was admitted). Don't rush your application to submit in EA because you think you have to to appease adcom; apply when you're ready -- in every sense of the word.