I like that Ability Reliance Punisher concept, and would find it interesting to see how it could be done. It'll be a good experiment on abilities for certain Pokémon and could certainly change the way we play if certain Pokémon are affected. As you say, the concept will require creativity. I for one can imagine a bulky user of Mold Breaker with some other tricks up its sleeve, since many of the mold breaker Pokémon are not that great defensively, or maybe another ability (perhaps klutz to trick toxic orbs from Gliscor?). This is just me though, and I'm sure other people will have ideas for what to do with it that are better than mine. If it is chosen I'll enjoy looking forward to its development.
As for my own concept, it is now only in hindsight alongside the words of Rising_Dusk that I see the similarity between Tomohawk and the concept. Sorry about that! :3