I was never asked to give advice related to depression. Which was a good thing because I was suffering my own depression because of the cult. If asked I hope my advice would be to LEAVE!
However, I was once on a shepherding call with another elder and we met with a sister that had some desperate financial problems. I gave her advice for which I was qualified to give. I felt good about that and I hope she listed to what I said. Neither she nor the other elder were aware that I was pursuing an education which culminated in a CPA and PhD in accounting.