Treatment is not selected by diagnosis alone. Your therapist will draw from whichever combination of evidence-based approaches best fits both partners' histories, the patterns showing up in the relationship, and what has worked or not worked before.
For some couples that means EFT to address attachment patterns alongside CBT adapted for trauma-related avoidance. For others it means DBT skills for emotional dysregulation before any communication work begins. For couples where one partner has BPD or PTSD, a structured protocol like SAGE or CBCT may be incorporated into the integrative plan.
The treatment plan is built after assessment, not before, and adjusted as the work develops.