I've done a lot of MonoSteel runs (enough to have beaten a game with every non-Legendary Pokémon, and this one was... alright as a team. It was all pretty even, and could lose against Pokémon of the same level. Togedemaru was actually rather good for most of the game but really fell off at the end, and Sandslash was only good when he evolved but was then really good as long as he avoided the double weakness.
>>30694983I once ran HeartGold with Bastiodon, Steelix, Bronzong, Forretress, Probopass, and Wormadam. It was a truly, truly awful experience.