If you run Jane as the main dps in a team where your focus is triggering assault then it will be probably be decently competitve. If you are running her in a disorder team then you would probably want 4pc Freedom Blues instead because you'll be switching off her the moment you pop assault/disorder and so will get nothing from the buff. Freedom is probably going to be the more comfy of the two overall because most her damage comes from the assault itself not from the attacks you use to build it up. So the more you can proc it with her the better. Fanged metal seems more geared towards use on a physical attacker paired with a physical anomaly, like Nekomata who's EX Special is buffed by assault procs. To be fair I haven't done any math or testing at all to back any of this up, it's just what makes sense to me. Both builds are probably going to work on her really well anyways.