The thing about this set, as alluded to in the original post, is that it can beat Pokemon it normally couldn't, like Heatran (on the switch for free substitute or focus punch), but it can longer beat some Pokemon it would check with more standard sets, such as:
Sableye-Mega @ Sablenite
Ability: Prankster
EVs: 248 HP / 252 Def / 8 Spe
Bold Nature
IVs: 0 Atk
- Calm Mind
- Shadow Ball
- Recover
- Protect
This set easily walls Mega Mawile lacking play rough and iron head. Thunder punch could be a problem with Koko support, but I'm not sure if that's commonly paired with Sub Mawile. If so, protect can help stall out electric terrain.
I understand that play rough is on almost every set, but we just need to check this one set, right?