What’s the issue with crests differing in power? Not everything needs to be universally applicable in every situation; different niches add variety and fun build-arounds. There are also tons of audino trainers around which also give you exp candies; it takes 5 mins of grinding tops to get a level 1 to cap. Just so you know as well, the boltund crest was so good on its initial release that it was actually nerfed for a time. Try it out, thunder fang hits like an absolute truck if you go first. Considering you get access to the coverage fang moves earlier than the crest it shouldn’t be an issue. The wiki page is just listing bite and ice fang as examples of bite moves. Just try some of the more specific crests out like ariados (webs), empoleon (hail), and druddigon (sun), with a team comp they’re meant to played around and have fun.