Zirda, the Dawnwaker While all the companions are powerful, Zirda, the Dawnwaker caught a Legacy ban for its combo potential
Keep your life counter apps handy
Rionya, Fire Dancer Rionya, Fire Dancer plays a little differently than other token generators because it feels less like a card that makes an army and more like a combo enabler
Theres a curious thought experiment to be had in trying to review the artifacts that broke previous Standards and consider how they would have fared with colored mana costs (or artifacts in the most recent sets with colorless mana costs)
I also threw in the more powerful venture cards just to maximize that AFR feel (and our odds of a 2-turn dungeon clear) with the exception of Acererak, who isnt quite as cool when we want to smash out repeated loops of Tomb of Annihilation compared to just one
Once players are familiar with layouts, they can shift to a softer playmat of their own choosing