Hi, Woolie. I was going to reply to your pred thread, but you seemed to only want feedback on people with CFS/ME. (I would have said that I had seen repeated tapers in normals from 60mg or even 80 mg, with no problems whatsoever . No psychological effects either.)
WBC rises quickly with those doses, to ~20. AFAIR, that's mainly from neutrophils leaving compartments such as the marrow and spleen. The neuts are less active though, hence the immune suppression. Since neuts flood into a muscle after exercise, along with macrophages, then still having PEM despite suppression of neuts might mean that macrophages are really what need suppressing. I don't know if pred affects macrophages or not.
Congrats on having found something that works for you. I'd stick with it.