Actually....

I DO have an army of JOATs! They aren't undead, but they were all masters at every skill before the age of 14. My youngest was 3 and I did this without cheating (no photoshop tricks or time travel), although it was slow and painful...

To learn how, here's the spoiler:

Get far enough in a tribe so that the chief can educate children. Have all the women in your village give birth to as many kids as possible. Repeat this until the oldest child is no older than 10 years old (to be on the safe side). Then, keep the game paused, and only unpause it long enough to have the chief teach the children once a day and then pause it again. Repeat this EVERYDAY FOR ~2 MONTHS. That will be enough to make all of your children JOATs and on the 2x game speed it will take about 1.5 VV years, so your oldest chld should now be ~12. Again, this is not very fun, it will take forever, but it works! But if you play this as a side village, you too can have your very own army of JOATs!


UNEDITED: