I'm thinking that the council perhaps has it eye on the Booster Attack set with Outrage that oldspicemike used to qualify for OLT along with its set variety and general ease of setting up due to its cover legendary bulk. I've never thought that the Breaking Swipe set was all that with how little damage output it actually has. Booster Attack cleaves through fat pretty easily and beats Dondozo with minimal chip.
252+ Atk Protosynthesis Tera Dragon Gouging Fire Outrage vs. 252 HP / 252+ Def Dondozo: 224-264 (44.4 - 52.3%) -- 19.1% chance to 2HKO
that calc is so fucked up. if you can get even a little bit of chip on dondozo it's already over