Everything about the myriad mechanic is optional
Knowing only Yuma and Astral could end the fight, they had to remain behind as bait

Arcanum Things (playtest) Ardenn, Intrepid Archaeologist Armed and Armored Armored Skyhunter Armory Automaton Auriok Survivors Auriok Windwalker Balan, Wandering Knight Barret, Avalanche Leader Battlefield Improvisation Beatrix, Loyal General Blacksmith's Talent Brass Squire Captain America, First Avenger Cass, Hand of Vengeance Cloud, Ex-SOLDIER Codsworth, Handy Helper Frodo, Determined Hero Fumble Galea, Kindler of Hope Gilgamesh, Master-at-Arms Goldwardens' Gambit Grip of Phyresis Halvar, God of Battle Heavenly Blademaster Inventory Management Kazuul's Toll Collector Kemba, Kha Enduring Kor Outfitter Luxior, Ignited (playtest) Magnetic Theft Nahiri, Heir of the Ancients Nahiri, the Lithomancer Noctis, Heir Apparent Ogre Geargrabber Quest for the Holy Relic Ratonhnhak:ton Raubahn, Bull of Ala Mhigo Reckless Crew Resolute Strike Rhuk, Hexgold Nabber Shagrat, Loot Bearer Sigarda's Aid Sokka and Suki Sokka, Swordmaster Stolen Uniform Stonehewer Giant Stonehewer Giant Avatar Super-Soldier Serum Swordsman, Sharp Scoundrel The Invincible Iron Man Thieving Skydiver U.S.Agent, John Walker Unexpected Request Vault 101: Birthday Party Vulshok Battlemaster Weapons Vendor Winter Soldier, Icy Assassin Yuffie, Materia Hunter Zack Fair

The extra build potential with Inversion and it being a little bit more unusual makes me prefer it but it is hard to call it better overall
Horned Sliver on a field full of Slivers can be a win condition