Which medication proved to be most effective for emotional dysregulation?

About to start my daughter on adhd meds after our psychiatry appointment next Monday. We don't have an issue with school, she does great in school and falls apart when she gets home. My only issue with stimulants is they will wear off by the time she gets home or even put her in a crash mode where she is irritable. Our biggest problem is the emotional dysregulation. Would guanfacin be our best bet here or clonadine?