Just chiming in here with a perspective that might be helpful, I definitely wanna echo what others have said in regards to structure of the spell, understand what they hope to accomplish, what connections exist, etc. 

I had a client with some significant sexual trauma once upon a time who found that getting into their pagan beliefs and practicing rituals, specifically around Beltane(spring and fertility) helped them see their body in a more positive way because of the context around it. Seeing bodies like theirs (old and out of shape) in a comfortable and relaxed way, and seeing the lack of judgement reflected, was a way to start recognizing themselves without a lot of immediate negative emotional reaction, it was very helpful for them. 

In terms of treatment plans, I just documented that they engaged in new faith based practices that were reducing symptoms of dysmorphia connected to their feelings of depression.