People wouldn't touch hunts with a convoluted system akin to this. The whole reason people actively hunt is because they're mindless. You go and kill something for a reward; nice and simple. Necessitating certain roles just restricts players. If you don't have any Black Mages around, well, sucks to be you. On the flip side, if the fire weaknesses isn't enough to matter, no one cares about it. Hunts are mostly fine. The only change I think needs be made is scaling. Either have old ones scale to our level or vice versa.