Here is what I do.
1. First train them in building. Building seems to be the hardest for them to learn for some reason, so I start with it,
2. Train them to farm, and
3. Train them to be master scientists.
Once they hit elderly they walk at a snails pace, so the sooner you can get them to master building and farming, the better.
I've found that it takes 14 Isola years to train a master builder, another 14 to train a master farmer, and a little less to train a master scientist.
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The VI