I'd leave the coolant temp one alone, it is for warm up, you really shouldn't be doing WOT unless your warmed up anyway. It works fine.

What your after is the WOT AFR when engine is warmed up, you had the right table above.

I don't see any -8, only - I see is after redline. There is a .78! I increased all mine between 1200 RPM and 5600 RPM because I don't go higher. Now with juice and a stick you may want to do from 1200 up to max in case you miss a gear and over rev...