So now you are at about 38% down on rear suspension rider sag pre-load and 20% static sag. With max pre-load I am at 50% rider sag. I only measured on the XC and only Rider Sag. With wide open damping, I like the ride I've achieved very much for the smooth roads that I typically ride.I felt that my XE was letting too many sharp bumps thorough the suspension. To the extent that some road surfaces would induce traction control activation under hard acceleration in the first 3 gears.
I have just settled on my own suspension preferences for the XE.
Front, open settings for comp and rebound damping, 4 turns out ( comfort settings as per manual). Drop the yokes/trees/triple clamps by 20 mm ( lower the front).
Rear, compression and rebound set to the comfort setting as per the manual. 5 turns of rear preload applied. This is as much as i could apply by hand. I lifted the bike using my ABBA skylift so could apply 5 turns rear preload by hand .
Rider weighs 100Kg
Before rear preload adjustment (zero turns)
Static Sag 58 mm
Rider Sag 108mm
Post adjustment 5 turns preload rear
Static Sag 49mm
Rider Sag 97mm
This adjustment in shock stroke position (11mm longer) has allowed the suspension to move more quickly and so absorbed the sharp road bumps, as it is on average 11mm further down the rising rate curve and in a more open part of the comp damping circuit. I would have liked to have applied more preload but I feel that I am eating into the soft portion of the spring stroke. I am happy with suspension now for 2 reasons, it is more compliant whist maintaining good damping , AND I made the changes, so it feels like my bike.
If you did want to try to add more pre-load, it is much easier to turn the adjustment ring (after loosening the grub screw) without a shock spanner wrench, by grabbing the ring and the entire shock and turning them together. I imagine you have seen this video, but in case you have not, it can be very helpful.