My studies taught me that mental health can be 'measured' by the quality of angles, and harmony of the properties between the Sun Moon and Mercury. Here we have the ego, emotions, and thinking combined.
But I'm thinking that more severe conditions include the effects of other planets, and prominence for constructive or non constructive purposes they have in the chart.
To me, 'mental health', is a mix of physical health conditions, including brain chemical imbalances, hormone disorders, even kidney and liver disorders, etc., and conditioning from life experience. The chart could be read from medical astrology perspective for the physical component, and then from psychological astrology perspective for the other components, for a more thorough view of just what is affecting the client's mental health.
Utahn, I think it is just so perfectly wise of you to study psychology with the family history you have, and the chart you have.
Because you are in Utah, it also makes me think of the genealogy work done in Utah, and the access to death certificates which can indicate some health history of the individual. As in, the coroner may write that the person died of cancer, which had been treated for 7 years before death, beginning in the x part of the body, etc. These bits can give clues to genetic weaknesses in the family tree which may contribute to mental health problems.
There are also astrology studies on the role of the North and South Node, carrying past life baggage to this one, and using it wisely or being 'done in' by it, and giving direction to the purpose of this life. I say this to suggest that understanding the Nodes of a chart could help a suicide-prone individual make clearer identification of the most important challenges, vs. the ones the mind makes, and thus help the individual do the work of this life, and make progress, rather than succumb to being overwhelmed. Steven Forrest is one very good source on this material. But there are others. Steven Forrest seems a bit possessed with his life experience and study illuminating the powerful significance of these karmic quests. I think he has seen this to be very real, in his lifetime. I have seen him go from being a very junior astrologer to the world respected status he has today, and tend to believe that if 'sees' a new knowledge and reports it, it is very worthwhile to study.
Another direction, I wonder about, out west, if there are karmic tolls being paid for wrongs against the American Indian. Until a generation makes amends, it continues. I have no research to back up this notion. It's just something that comes to mind, as a necessary balance, yet not achieved.
Past life work, with astrology, is very very intense. There are a few astrologers who specialize in this, and I know people who claim this made a tremendous difference in their lives. For some, it helps to give great personal meaning to an otherwise, deprived life. They are enriched by having a life with purpose, and no longer need the physical rewards, comforts, privileges and good fortunes the rest of us have. It's truly an inspiring sight, to meet these people, and see them work.