I feel that those daggers are completely overblown; i'm rank 140 and
have never used one
If i had to say though, wind benefits from it stronger than any other. It heavily depends on what characters you have overall; and some elements simply don't do as well with a dagger class as they could otherwise.
They are by no means bad however and its fine to grab a few, but the autists claiming to get more than 2-3 generally do not know what constitutes a working team comp outside of the generic multiattacks.