Seriously, I have no idea what you mean. If you don't like the stats of the current artifact weapons, change them, but weapons made of the magical materials are all artifact weapons.
If you want alternatives to daiklaives, there's goremauls and grimcleavers, all those fancy MA weapons, and plenty of stuff in other sourcebooks.
But whatever you're planning, no, that would be an awful way to calculate the artifact cost. No artifact weapon should ever go above 3 dots without some kind of special power, and the same goes for artifact armor (the core armor is wrong in many ways).
If you want alternatives to daiklaives, there's goremauls and grimcleavers, all those fancy MA weapons, and plenty of stuff in other sourcebooks.
But whatever you're planning, no, that would be an awful way to calculate the artifact cost. No artifact weapon should ever go above 3 dots without some kind of special power, and the same goes for artifact armor (the core armor is wrong in many ways).