Scavenger
I guess I am looking for something in an AFM that says, look at the EGT, lean until peak, then continue leaning until 50 (or whatever) cooler.
Well you could find it in some but not others, explicit good education that is. Problem is as described by others above, you will struggle.
As a comparison, the POH does not tell you how to comply with the Instrument Flight Rules, yet the aircraft is approved for IFR flight.
For some reason the thought process is unless it is spelled out explicitly in the POH you can't do it. No thinking allowed.
Also for LOP ops or for that matter ROP ops, the appropriate amount either ROP or LOP varies as the power increases. The book gives one set point and it is only one recipe in the cookbook, not all of the infinite possible variations.