EFT is my go to model and I feel like this couple could easily benefit from it. You identified the goals and interventions exactly how I would've imagined. I did noticed that Allisons mention of being convinced it was her fault and admitting to letting herself go. In sessions I believe thats something that can be focused on as well in sessions. I feel like her admitting that she's been putting her all into the kids and neglecting herself and open a new place of empathy that Julia to attend to in session. I chose Solution Focused model and I can also see how giving her all to the kids could be a strength as well, where Julia could take the backseat as the secondary parent.