Yesterday I printed the same image in: Thiocarbamide-Sepia at various bleach times and AB toner dilutions; Thiocarbamide-Gold; Thiocarbamide Sepia then Thiocarbamide-Gold; Selenium (KRST); Selenium then Thiocarbamide-Gold; and Thiocarbamide Gold then Selenium. Wonderful variations in effect. I'll scan the results and post to the technical gallery when I get a chance.
AFA the original question, I usually print with slightly lower contrast when planning to selenium tone. I give slightly more exposure if I will use a toner that incorporates a ferricyanide bleach. I much prefer warm-tone papers as they react in selenium to change color to a greater degree than cold-tone papers.