If Possessed Skaab would die, exile it instead.) from Origins
Running it alongside The Reaver Cleaver and Beamtown Beatstick et al is of course going to fuel it reliably, but there wont be a game where this doesnt trigger multiple times a turn cycle
Play Megrim next as well as one of your draw/discard creatures such as the Cephalid Broker or Lore Broker or your force discard/draw creatures such as Barbed Shocker or Abyssal Specter (there are many other Specter creatures that will work as well)
As for Clarion Ultimatum, the sorcery can do some really powerful things, but we also had a lot of games where it rotted in our hand while we tried to find the mana to cast it, and also a few where we had the mana but didn't really have any good targets (casting a seven-mana card and getting a Birds of Paradise, a Noble Hierarch, and three lands for our trouble doesn't feel all that good)
Fighting is one of these elements where my article should really be named Just My Types because it actually covers more than just one type from the video game: Fighting, Ground, and Rock
a resolved Consecrated Sphinx is still incredible, but its just not the tilt-inducing powerhouse it was in the early years of Commander