Seems like most of you have a very high pressure advance. I run a Zesty Nimble on a Hypercube Evolution with a 0.6 mm E3D Volcano hotend. Sweet spot seems to be somewhere around 0.01-0.03 depending on how flexible the filament is.

I usually run 2 mm retraction at 40 mm/s, seems to work good for the Volcano.

I created this script to generate test files for pressure advance calibration if you would like to try:
https://github.com/LHelge/RRF_PressureAdvanceCalibration