That's pretty much the recipe Fonzie. I haven't double checked the exact one but it sounds about the same. The one I'm talking about is state approved in Ohio and to get that approval several psychiatrists appointed by the state along with pharmacists had to put it for review. In short, if you ever prescribed such a treatment, it's not completely out there. If you want me to get the exact recipe let me know just in case you want to CYA.
When doing long-term psychiatric care and working in a facility for such, the treatment focus is very different from usual psychiatric units. It's not out of the ordinary to have maximum dosages way above FDA approved levels and have several pharmacists and doctors working at the institution that are familiar with evidenced-based data showing this has some merit to it (and you're dealing with very treatment resistant patients).
Likewise you get a lot of patients on Clozapine and doctors with excellent experience in dealing with it. Before I worked for the state in a long-term facility I probably only had a handful of patients on Clozapine. After leaving the state hospital I probably treated a few dozen on Clozapine.