Your current timing curve sounds good, I would run between 1-1.5 degrees of retard per pound of boost.

For a/f at idle, do whatever the car runs best at, don't be too concerned with an acutal a/f ratio.

For a/f at WOT, the boosted guys typically run in the 11.5-low 12's range. Running overly rich helps to surpress detonation which is why they typically run a bit richer than ideal, at least to start with.