The Art of Forging Infineum - #2298. The final weapon combinations from Smith Korgorth only work for the dagger and the 1 handed axe. None of the other combines seem to work. I bought every single item, just to make sure, and we tried on multiple classes to ensure it wasn't some sort of class lockout or bug. All of us got the same thing. If you do craft either the dagger or the axe, you do not get credit for the "Assemble an Infineum Weapon" portion of the quest as well, so you the line is effectively broken at this point. It would be awesome if this quest line could be completely implemented. It was epic!
Again, thanks for all you guys do!