Its currently not possible to create a Mod for Conan Exiles that modifies the stats on DLC weapons. The weapons do not even appear on the Item Table in any form or fashion.
What this means is when you modify weapons for purposes of server balance or different playstyles, these weapons either become OP or Fall behind depending on the route the mod takes. Its understandable that we do not wish for the DLC images or values to be modified in the item table since it could allow us to bypass the paid DLC requirement.
Instead I would suggest that the DLC weapons be tied to their Iron and Star Metal weapon counterparts. What this would mean is if you change the value on a Iron Sword, the Aquilionian and Khitan Sword would inherit the items stat values.
This would allow for us to mod weapons freely without fear of the DLC content becoming obsolete.
I bring this up as a concern because my Archery Mod:
Adjusts the values of all Bows and Arrows. But the Aquilonian and Khitan Bows cannot be altered. They remain in a ‘nerfed’ state and are pretty much not usable. This is a shame for those who use the mod and have those DLCs.