One Twilight can, in much less time, make enough protoshinmaic vortexes to fully obliterate Creation. One Twilight can, in much less time, release the Kukla. There are far too many things that can be done in the game (especially by Twilights) which are only prevented by a good ST saying "shenanigans-no". It's best to remember that, for the most part, a good artifact is unique. Really, in the First Age, that Twilight has more practical uses of his time. First Age Dragon-bloods will always be better than mortals, even enlightened mortals with CMA, Tiger Warrior Training, and magitech armor. The only reason for a Twilight to make even ONE of these is going to be a unique and interesting reason. If it's not, you have more problems than simply having a mechanic that isn't allowed in the initial setting concept.