I agree about it sounding like a manic episode a lot.
If I were to put up an opposing opinion -- some caveats here: cluster B disorders and autism both can include lithium (and symptoms not too dissimilar from mania), lamotrigine too on the BPD front. Mood stabilizers are prescribed in combination for a variety of conditions, I feel like it's a rather large jump to make. Also, Moda and a Benzodiazepine are going to do incredible amounts for the dopaminergic system, as well as lowering social punishment-conditioned fear responses. If someone is borderline manic, that could cause a lot of problems.
Pramipexole is a seriously hardcore drug, I'd encourage you to look into it specifically over other dopamine agonists if you haven't already. I survived one day before deciding it wasn't worth it, personally.
Plus, dopamine agonists can screw some things up about you semi-permanently, so that's a risk, too.
It really feels like a grapeshot cannon from her psychiatrist, to be honest. I don't know her specific situation, but some of the rapid-acting antidepressants have good effects (like Ketamine, which operates I believe on D2, among other things).
Just a few thoughts. I dx' people casually from very little data as a weak point myself (did it today, sorta, in retrospect to be honest), so partially this comment is my internal warning systems triggering on an external comment.
Also, I wanted to put a different opinion so HN readers could get a different potential aide.