Given the availability of supernatural methods then, to get your less dangerous humanity, I'd suggest reinvoking a version of the Tower of Babel. I'm pretty sure that after a couple of generations of no two humans speaking the same language they'd be far easier to herd and farm...
(Mind you, be sure to watch out for the large number of now very pissed off spirits, loa, gods, and sundry supernatural beings who are no longer getting prayers that they can understand from humanity...)
(Mind you, be sure to watch out for the large number of now very pissed off spirits, loa, gods, and sundry supernatural beings who are no longer getting prayers that they can understand from humanity...)