I would normally start with rear static sag of 20mm and work back to 10mm if necessary, a good all round setting is 30 mm front and rear laden static sag (you sitting on the bike)
The rear shock Rebound Adjuster on Fork 5, Low speed compression Inner adjuster 5, High speed compression Outer adjuster.Any more than 30mm and you are using to much of the suspension stroke for the damping to work properly when riding.