NAF – New artifacts with unique properties.

U.n.k.n.o.w.n., your suggestion is very interesting, but I'm not sure if it will be possible to implement a combined set of artifacts that are already in the game (by default). As I understand it, without access to the game's source files, we can create new artifacts + make sets of new artifacts, but we cannot create new combined sets from old artifacts
But if I'm wrong, I'll be happy to be proven wrong.

Added after 4 minutes

What justifies the special treatment of machines?

The question is:
When you level up, you are offered a choice of upgrades. If you are not playing as a machinist (which is often the case), and you are offered the following skills (luck, attack, defense, combat machines), what will you choose?