This seems to be working very poorly. Is it expected to take months to turn a slime/fairy/whatever into a functioning member of society? Is there some way to speed this up (without using elixir of regression) such as multiple tamers, or improved stats on the tamer?

It would be nice if there was some indication that it was being done right, too; for instance if the end of day screen said something about my headgirl helping to tame x and y girls rather than having no feedback at all until it works.

I noticed that keeping the tamers under "Rest" speed things up. Also, I believe it's harder if the uncivilized slave's obedience is low.

Also, if the uncivilized slave is in the jail, but the Tamers is set as "Headgirl", there will be no progress at all. (Works fine if Tamer is set as "Rest")

Every tamer has about flat 10% chance per day as of now. 

Every tamer = multiple tamers work?

I've had success in the two following situations:

Tamer as headgirl, tamed as cleaning

Tamer and tamed both as hunt

As far as I know, a tamer can only do their job if they are resting, in a managing position or working in the same job as the uncivilized one.

I tend to keep two tamers in my mansion: one is a jailer and the uncivilized slave is in jail, while the other tamer is set to rest or hunt depending on if I'm needing to break an uncivilized. Then it's just random chance.