The Polymath Specialist Artificer for Dark Sun or Bronze Age Campaigns.
During the third century BCE, Archimedes made tremendous strides in a wide array of fields from engineering to mathematics to architecture. According to some legends, he even came up with mechanized war machines hundreds of years ahead of their time, the functioning of which seemed to verge on magic. Following this vein, Archimedes makes a logical archetype upon which to model a Bronze Age-style artificer. And with a few changes to allow for the magic-poor but psionics-rich environment of Athas, we can create a version of the artificer class which would actually work in a standard Dark Sun campaign.
This is a companion discussion topic for the original entry at https://athas.org/articles/the-polymath-artificer