I wanted to exclude non-permanents for thematic reasons. Power level wise, it's a bit below a 75% list due to these restrictions.
It ends up that there a somewhat wide array of semi-combos with Wizards and Auras/enchantments. Most of these are useful to help ensure that there is sacrifice fodder for Ertai, but can also feed into a semi-voltron kill via Fallen Ideal.
- Academy Researchers and Fool's Demise is an infinitely sacrificial creature.
- Glen Elendra Archmage and Puppeteer Clique are infinite sacrifices with Sage of Fables or Solemnity in addition to their effects.
- Stonybrook Schoolmaster and Intruder Alarm can be infinite tokens with a tap effect, or infinite sacrifices with Faces of the Past.
- Boonweaver Giant is a fairly well known combo withGift of Immortality, but also works with Unholy Indenture, False Demise, and Fool's Demise.
- Kitsune Mystic only targets the aura itself, so no amount of hexproof/shroud can stop Treachery.
- Treachery and Flickerform can help keep mana untapped, especially if Serra's Sanctum is online.
- Teferi, Mage of Zhalfir and Cryptic Gateway break parity with Arcane Laboratory, which helps slow the game down to the point that the control can be up.
- Animate Dead and Necromancer's Magemark combined as a repeatable creature recursion engine with any method to recur animate dead.