Takahiro created alot of the Teigu only having in mind the person that would use it. Perfector worked for Stylish due to him being a doctor. And with that "lame" Teigu he almost took down NR by himself and only lost because of Susanoo.
I think that L`Arc Qui Ne Faut is the most lamest Teigu, as long the user dosen´t know your name this Teigu is just a regular bow. I like the idea of Perfector isted of just a cliche Teigu that can create a beam of energy that can heal wonds.
It only gives you "the ability to appear as a competent sniper", all the other teigus increase the users skills or given them super powers(some do both of them), but this one does that in a very bad way. If the user could control the arrows it would be great, but you need to know the name and you won`t know that a lot of times.