A 34-year-old woman with a confirmed diagnosis of dissociative identity disorder (DID) presents for treatment planning. She has a documented history of severe childhood abuse and reports frequent dissociative episodes, identity confusion, amnesia for daily activities, and emotional dysregulation. She has had multiple psychiatric hospitalizations for self-harm, though she denies current suicidal ideation. She is currently on sertraline 100 mg for comorbid depression and prazosin 2 mg at bedtime for trauma-related nightmares. She expresses interest in addressing her trauma memories and asks to begin EMDR immediately. Which treatment plan is most appropriate?