A Guide for fast trainers

[Tactician]

You mean Zatko is a significantly faster trainer than Rousar? Did you verfiy that? Take into consideration that Rousar is a 20 y.o compared to Zatko's 18.
You are spot on concerning using the value as the first indicator but the wage value might still contribute (at least in the medium levels). When I do comparisons, I consider value relative to the players quality but I check the wage value too.