The best advice to lean an engine might be given by Mike Busch of Savvy Aviation. His technique does not rely on EGT indications. However, to initially determine the parameters to lean your specific engine/airframe using his method, some gathering of numbers is first required for CHT, EGT, FF, and MAP. To do this, Mike has a great book called "Mike Busch on Engines: What every aircraft owner needs to know about the design, operation, condition monitoring, maintenance and troubleshooting of piston aircraft engines."
The book goes deeply into getting the most life out of your engine. This is done by avoiding the "danger zones" that he calls Red Box and Red Fin, which are the engine operating regions that put excessive stresses on the cylinders and pistons.
He also did a good video here:
. . It is not Dynon-specific, but it's probably the best advice out there for both performance, fuel efficiency, and engine longevity.