I genuinely feel sorry for anyone that gets depression from Nandrolone's! I can't imagine not having a cycle with some type in it, only thing that seems to help my joints!
One thing I've gotten into the habit of doing over the years in the quest to keep stable blood levels, regardless the compounds I'm using, is having frequent injections. So if I'm running 1000mg Test E, 500mg Nand Deca and 500mg EQ per week, I calculate how much I need to take each 3rd day and pin every 3 days. If I'm using any short acting in the mix, I pin every 2nd day.
I've just found that's always kept me feeling and growing the best, not sure if it can be of help with your depression but thought I'd put it out there.