Maybe now, even only an atypical antipsychotic may be enough. To varying degrees, they help you to sleep as well. Maybe not. It's like one big mathematical equation with hopefully not too many variables, many factors. Both time and place being important ones.

Less can be more.

Benzodiazepines create a strong dependence and should actually only, if at all, be used for acute anxiety (or mania, where anxiety induces or prolongs mania). Factor in time for withdrawal with lots of anxiety, insomnia and restlessness.

Some supplements might be essential and some can be used to compensate for a natural deficiency which is hard to rectify otherwise. Acetylcysteine, or rather the cysteine, prevents cell damage when (your brain is) overactive or there is a problem disrupting normal/efficient metabolism, causing there to be too much or to little of (potentially toxic) substances. If a natural/genetic deficiency and overactivity cause too much cell damage, which can cause mania/psychosis, NAC helps.

But most/many "supplements" you probably don't really need and are likely not used at all if you don't have a deficiency.