For what it's worth, the folowing advice was given by Masters such as Ansel Adams, Fred Picker, et al:
For FB prints
-Don't use anything that includes the word "rapid" (Kodak Rapid Selenium Toner being the exception)
-Fix for 5-10 minutes using two fixing baths (AA recommended at least 5-6 minutes total fixing time)
-Rinse for 1 minute
-Hypo Clearing Agent solution for minimum 3 minutes
-Wash for a minimum time of 1 hour with a flow-rate of at least 60 gallons/hour (correction) at ambient temperature
-Selenium tone (optional) before final rinse.
These are the important steps - all the claims associated with time saving formulas and methods are just allot of deceptive marketing.
It's my feeling that the Masters did all the testing for us, already.