Could you make the masklings be able to build lumperyards and stone mines, but only once they get the special resources you give them, so they can become self sufficient?
The Masklings not being self sufficient is central to what makes them different. If they could make those materials they wouldn't need to raid and steal. They might be a little too overpowered, even.
I more meant for it to be that once they've stolen advanced resources, they can learn to replicate them using said resources. They'll still have to steal resources to get to this point however, and it would take a long time for them to begin producing even a small amount themselves.
