Linear deified reputation

Could the reputation requirement into deified be a fixed 5000 points? Otherwise prophecies take an increasingly long time to fulfill (while other time investments remain constant). Could the task to increase god reputation also weigh heavy towards gods with the lowest reputation?

If the problem is player using alteration spell to farm the most effective reputation, you could add a sink for turning in X emblems of each god so players are encouraged to do all realms evenly.