So this is a question of preference, but STAB Facade with a 30% boost is a great way to answer being burned which would otherwise be the end of Tinkaton, and it also has the added benefit of being a safe Skill Swap ability against particularly tough walls and Pokémon that do have Huge Power/Pure Power. It also creates an interesting option for the off turn move between Gigatons. I definitely prefer Pixilate over Steelworker.
If you are open to other builds, there's something to be said about Multiscale.
I wouldn't replace Tinkaton with Revaroom or Gardevoir without knowing your team, but I see what you are going for with both.