I use the same Ilford Fb in semi matte warm tone, and felt the same about the blacks. I single filter print and split filter print with it. I have found my way to get the blacks that I want.
I print to get all the shadow detail I want, develop and dry, then once I have a collection of 20-50 prints and selenium tone 1:19, at room temp, for about a minute or two, until I see the rich black I want.
I hope this works for you. If not, when I ask for ideas in the darkroom I like to try each one that I get. Being in the dark is better than being in front of a computer.