I come from the point of view that Pyrocat HD was developed for use in a Jobo/roller system and was intended for constant agitation.
My Jobo has one speed only and I had disappointing results with 1:1:100. Sandy suggested I try 1.3:1:100 to compensate for the "High" speed of the single speed Jobo. I did and it seemed to work but not to what I expected.
I now use 2.6:2:100 and get what I think are good negatives. My films are FP4+ and HP5+. "Normal" times are about 10:00 minutes and I do use a pre wash.