Teaching a child coping tools/skills is never a waste of time. There are times it is less effective, but it is not a waste of time. Chemical imbalance or not, impulse control tools are valuable. SS was diagnosed ADHD. He had other issues which were not addressed and he "used" the diagnosis to excuse his bad behavior. He had the ability to control himself, because he did so quite well at our home, but failed to do so at his mother's home.
On another note, in order to get BM ordered to do a psych eval, you must either have an open ongoing court case or have sufficient change of circumstances in the life of the child or BM to overcome the threshold a court will impose PRIOR to letting a new motion be entertained. If you aren't in the middle of something already and you can't PROVE there is a change in circumstances you will not get the order you are inquiring about.
On another note, in order to get BM ordered to do a psych eval, you must either have an open ongoing court case or have sufficient change of circumstances in the life of the child or BM to overcome the threshold a court will impose PRIOR to letting a new motion be entertained. If you aren't in the middle of something already and you can't PROVE there is a change in circumstances you will not get the order you are inquiring about.