Should probably mention that the uncheesiest Dvati entry is just Cleric 5/Divine Disciple 5/Fiend of Possession 6 or Favored Soul 6/Divine Disciple 5/Fiend of Possession 6 using Versatile Spellcaster to qualify for Divine Disciple's "able to cast 4th level spells" requirement. Cleric is optimal because it's a level sooner and gives you 4 levels of Legacy Champion or whatever you want at the end, but not everyone agrees that the Cleric's spontaneous cures/inflicts counts as being able to spontaneously cast spells for Versatile Spellcaster.