Out of the many job classes, divine jobs such as Holy Knights and priests would always progress the quickest in power level. However, these jobs also had the fewest individuals at the highest ranks.
The reason for this was simple. People in divine job classes would need to establish connections to their God and obtain the God's assistance and divine favor… in other words, they would need to be spoiled by the God. Such people would be able to rapidly grow. From a certain standpoint, divine job classes depended on your personality. The more your personality agreed with the particular God's teachings and the more your personal talent was compatible with the God's divine power, the faster you would grow.
Wow.
On another note, I hope you enjoyed the chapter! We've come a long way in ELCL, Imperfectluck and I, and this is probably the longest chapter we've worked on. Here's to similar amazing chapters in the future!
--Pranav