1. Devestating Drake is still a very strong move and Dragon Dance with it is still quite strong on Kommo-o. Even in our cousin format Battle Factory, there are sets where Kommo-o uses Dragon Dance Outrage with Dragonium-Z, so it's still very very viable.The point was me asking why it gets 2 z moves of the same type when one is clearly beter. It's like giving Alolan-Raichu a chance to get Electrium instead of Alorachium when Stoked Sparksurfer is downright beter. I would understand if it got 2 different types of z moves like dragon and fighting, but why 2 of the same type? The simple fix would just be take off Outrage from the set since Clanging Scales is usually beter anyway.
2. The Alolan Raichu comparison isn't very good because it getting Electrium Thunderbolt is the equivalent of Kommo-o getting Dragonium Clanging Scales, which we have already established simply does not happen ever