I figured that the mystic forge is the place where you craft legendaries, but if I want to craft the precursor do I need a specific crafting discipline? I boosted an engineer, since I recently bought the game, so do I need huntsman to craft a legendary? Lastly, from what I know, there are HoT legendaries to be crafted, if you have trained the last mastery, so should I spend time getting one that isn’t HoT?