Which model? Original, or XO? Knob settings will be a bit different.
Try the SQSH / LED setting.
Keep the compression level below 12:00 if you want to maintain some natural attack.
The Pre-Gain and Post-Gain settings are going to be different for every rig. No real way to post standard settings of those. It depends on how hot your pickups are, or how much gain is coming into the White Finger.
A general rule of thumb for me is to set the Pre-Gain so that the light shows some dynamic range, from dim, to bright. You don’t want the light to be bright all the time, unless you like brick-wall limiting.
I usually set the Post-Gain so that there is unity volume between the bypassed signal and the effected signal when playing hard.
Hope that helps.