The answer, probably, is it depends which format we're talking about
EarthquakeEarthquake (40,189 Inclusions, 2% of 2,337,008 Decks) The original red boardwipe, EarthquakeEarthquake still holds up these days precisely because of commanders like Niv-Mizzet, VisionaryNiv-Mizzet, Visionary that want to be able to damage players
While he doesn't benefit from the shift ability, it also means that, like Clarabelle, you are less limited in what kind of deck you place him in
6WW: Put each card exiled with this artifact into its owners graveyard, then create a 2/2 colorless Robot artifact creature token for each card put into a graveyard this way
Fierce Guardianship is clearly the best, followed by Deadly Rollick exiling target creature, then Deflecting Swat