I like to split tone with thio then selenium, I have tried tri toning many years ago. I’ve always found warm papers unsuitable for split toning because no matter how little you bleach in weak bleach the paper invariably goes brown when redeveloped. For this reason I only use ilford MGFB classic as it is easy to just thio tone the highlights whilst keeping the paper base white and the rest of the image neutral and then the selenium goes to work on the darker tones. This gives the print a depth unobtainable without toning.