Oops, forgot to reply earlier. I think “severe mercy” can work, and I can’t think of anything better.
I forget how one talks about chord progressions in minor, but some form of ii-iii-vi is fairly typical, if you know what I mean. You might not be able to do that here without changing the melody, but the biggest thing that I found unsettling was the next-to-last chord, which I think would be better as ii.
