I set static sag to the recommended Maxton dimension, 25 - 35mm. The springs fitted in my forks are to suit my weight, (0.90Kg/mm springs) & riding style so adjusting sag with me sat on the bike after setting static sag would affect this static sag adjustment.
I'm assuming Maxton allow for rider weight when choosing suitable springs for each individual & the type of riding each individual does & what bike it is & the type of use/riding it will be subjected to.
I believe the static sag measurement is quite a standard dimension for all bikes, I have a mate with a Vyrus, (CBR600RR engine) & full Maxton suspension & the static sag for that bike was much the same.
The thing with suspension is you can set it up perfectly for one corner, but the next one can be completely different, so suspension is always going to be a compromise. That is true for both the road & the track.
You make adjustments to get the best, for you, feel overall & you settle on those settings.
To be honest, for me, my riding is all on the "normal" roads, in traffic, in normal everyday situations. Yes I like to go a bit fast sometimes, but to be honest I have to admit it would be nowhere near the limit of any of my bikes with the exception of my bobber !!
Standard Ducati suspension is too hard for "normal" riding, or at least it was in 1994 when my 750SS was made. Ducati had to make that bike suitable for me, for a skinny bloke & a big fat bloke so it can never work well for everyone as do all the other manufacturer's. That same criteria is true for todays bikes, so maybe this is why electronic suspension is the future as that can adjust as you ride.
At the end of the day my SS was supplied with non-adjustable, harsh front suspension & I have replaced it with good quality adjustable suspension & the ride quality has been improved vastly so I'm happy.