I tried the settings in this thread on the 'Nurb. I am no expert tuner, nor an expert driver. However I do have some settings that I can comfortably throw this car around with on the Nordschleife. With the other settings the car kept understeering or sliding in my case, with these settings the car will snap at me if I accelerate too enthousiastically after some corners, but feels otherwise pretty planted for me. The car is fully upgraded including aero parts.
Aero: - / 65
Transmission: 410 km/h (255 mph)
LSD: 40 / 20 / 35
Ride height: -17 / -14
Spring Rate: 11.5 / 12.5
Dampers (Ext.): 4 / 4
Dampers (Comp.): 3 / 3
Anti-Roll: 4 / 4
Camber Angle (-): 2.4 / 1.8
Toe Angle: 0.04 / 0.12
Brake Balance: 7 / 5
It's a variation on the settings already posted in this thread and I definately think it could use optimizing further, but for the moment it feels pretty solid with warmed up tires and I can speed around on the Nordschleife with relative ease.
Edit: my previous suspension settings were set a bit loose, I've updated my settings so the suspension gets a little stiffer and handles better in corners.