Hazard requires a true weakness. Something that can be used at a safe distance, or doesn't require you to pick at him until he goes down. The tail thing isn't a weakness. You lop one off, and there are eight more, and thus plenty of means to take you out with but a thought. And Hazard will be protecting his weak points viciously.
Oh god I thought I was the only one who thought his weaknesses were kind of bullshit.
This isn't Super Mario Sunshine or any other Mario game where you can just run around him a few times and yank his tails out, no way would he allow that since he has full creative control over his character and could easily just say something like "So and so tried to grab the tail and missed and was greeted with a fireball to the face."
I'm just going to say this, if "Hazard" isn't nerfed ridiculously, given a true weakness, made into a compete joke, or wiped out altogether very soon I'll give my characters over to Kharaxel, Phi, and Sakura and let them take care of it because I don't want to be in a god-mod RP with a show-stealing villain.