I used to take imipramine for a combination of sleep and depression. It was good for me because it came in 10 mg tablets and could easily be adjusted to accommodate depression or mania as needed. I usually floated between 50-90 mg but eventually started needing more and not tolerating it (and I think I was getting manic from the dose that was helping my depression if I remember right) so I had to go off it but it worked for me for several years which is the 2nd longest an AD has ever worked for me (the other being Emsam which has worked for 10 years).

I've been on doxepin but only at a tiny dose and it didn't do anything. They put me on it IP with my MAOI but my own pdoc didn't feel comfortable with it so we stopped it. I think I was on it once before long ago but don't remember that well.

Tricyclics can definiteliy help with depression and sleep both if you can get the dosing right.