I use a dilution of 1:0.6:120 or 1:0.6:150 using semi-stand development on the advice of Steve Sherman when I need extreme compensation (approx. N-5 development). Backing off on the B solution, which is the accelerator, reduces highlight development while allowing the shadows to develop fully.
Originally Posted by noseoil
For normal negatives to be developed semi-stand I'll use 1:1:120.