Board Thread:Off Topic/@comment-24993958-20160317004723/@comment-27447621-20160320134146

If you really want to make this work, you could make a Semblance that turns the user's muscle mass into Aura and vice versa. That way, you could sacrifice damage output and speed for more Aura, which means more durability, or you can sacrifice Aura to increase muscle mass, increasing speed and physical strength.

But, all in all, there are abilities like Yangs and Rens that increase Offense with no negative effects, so overall it would be overshadowed pretty quick.