I could never get a nice warm tonality from Fomabrom Variant 111 in selenium. Neither with the old, neutral-to-slightly-warm variation, nor with the new, cold one.
Right now I'm using 1+30 for four minutes, just to deepen the blacks. After four minutes the color of the print starts turning into an ugly cold pinkish blue.
Lower dilutions and longer times give the print a noticeable magenta cast, which I find unappealing.
I'm using Moersch MT1, not KRST, so I don't know how conclusive my times and dilutions are.
On the other hand, if selenium toner is followed by sepia, you'll get a nice, deep brown, deeper than sepia alone (which on Fomabrom is already deep to begin with). It's worth a try. You might like it.