CPTSD always requires multi-disciplinary treatment in my experience. In addition to working with the individual's trauma hyou have to recognise the trauma that is there in the entire family system. Recommedn the book "It Didn't Start with You" and "Childhood Disrupted" to get a better understandng of these dynamics. The therapies and treatments that we work with to resolve CPTSD include: Family Constellation, Somatic Experiencing, Inner Child/Re-Parenting, Family Systems Therapy and Shamanic Soul Retrieval together with a lot of pschoeducation and growing-up the child parts through programs such as Non-Violent Commnication, Radical Honesty and learning Emotoinal Regulation techniques.