ealdstan said:
Whoops! I made a mistake there. It says that about the characteristics not runecasting.
It would have to say that about characteristic increases; otherwise races with natural characteristics > 20 could never increase them. Perhaps that should be tweaked so the chance of increasing a characteristic is 5(Species Max - Current Value)%. Certainly Mistress Race Trolls and bicentenary elves should be able to reach their species maximums in power.
Even a master teacher with 100% skill in her subject can help her students advance past 100% extremely slowly. A 10% chance of a successful skill increase roll means that the expectation is 1.3% with teaching. Presumably, after a Jrusteli Sorcerous Adept has spent Hero Points with abandon to increase a spell skill to 200%, he spends a season or two earning money by teaching the skill to university classes.
However, barring absurdly good teachers, characters will need to resort to Heroquesting, The Jrusteli has stolen access to many of them, but most cultures will have access to the ones they think most important, whether it be "Barntar apologizes to Ernalda and gets permission to use a plow," (+10% Farming) or "Yelm proves his kingship" (+10% Influence). By and large, Heroquest rewards are not dependent on current skill.
This is a hidden advantage of the old cultures over the EWF and the God-Learners; every religious ceremony is a heroquest, and they have the ones they need to improve the skills they most care about.