I normally work in lambda and go to lambda 1.00 at idle and light throttle cruising, up to around 0.95 at high rpm cruising and light throttle acceleration.
On boost I go to around 0.80 lambda and have it at 0.78 flat out.
Once i've got the fuelling there or there abouts i'll start to add the spark in until I see/hear pinking and then back the spark off around 3 degrees.