I took several pics of a chart with the same settings of aperture, shutter speed and iso in manual mode with tripod and go to camera setting where you can adjust the af focus of lens accordingly i.e plus or minus to pick the best clarity for this setting. Pick another aperture and start all over again for this distance.
repeat the whole process at different distance now.
I ended up getting the same adjustment value regardless of the distance. if there is some minor variability then pick the best adjustment value overall for diferrent distance. It took me more than 1-2 hours for one lens. I did the same with my 85 1.2 mm ii and they are all very sharp now.
I hope this will help