Rich Idle AFR reading

For your elevation, your first numbers were pretty close in my opinion. I am at 1000' and hot idle 12.5-13. mild cruise is 13.9-14.5 and when the PV and secondaries kick in it goes to low 12's.
Stoich is 14.6 and there are charts available to give you the performance at different ratios. I like to keep my car as close to 14+ as I can. No leaner with my cam and timing though!