"Set the minimum age for ordination at 32, and make sure the guy has at least had one job outside the Church in his life."
Goofy idea. While late vocations can be very good, the idea that a man dedicated to Christ needs to go "experience the world first" is just goofy.
Read the data. The vast majority of the abusers were ordained in their mid-20s. Very few were ordained in their 30s.
You want to minimize the number of homosexuals in the priesthood, allow the heterosexuals to mature.