doesn't that depend on the deity though? i mean, i don't think silvanus is the type that would want his clerics to build churches or monasteries dedicated to him in the cities. so the stereotypical cleric lifestyle you're thinking of wouldn't be a thing for a follower of silvanus.
rather, clerics followers of silvanus would live in... a grove, right?
and the dominant hierarchies would depend on the specific religion/deity. it's not like tempus necessarily has his own version of dark justiciars like shar does.