The REVO settings remain a mystery. I've messed with them but each truck is so different that you honestly need to tweak the settings for your liking and driving style...
Torque: I believe this actually deals with torque management on automatics. Some surmise that the higher the value, the 'quicker' the program brings in fueling.
Timing: Seems self explanatory, the higher the value, the more timing advance you put into the program. I've actually gone back to using the timing that is used in Catcher softwares because the timing advance from 3 and 4 just felt wrong...
Duration: Best guess is that this will effect how long the VP will pulse for a single injection cycle. Again, I've gone back to the values used by the individual Catcher softwares because the higher durations were boggy and sluggish...
My truck is modified to the hilt so each person should really experiment on their own settings... REVO was developed just for this purpose.... the only two ways to really find out are at the drag strip or on the dyno...