It does require some quick math during your combo turns, but it should not be too hard to figure out once you can compartmentalize where the damage comes from
Any Standard-legal MTG set that was released from Return to Ravnica (2012) onwards is legal in Pioneer
Atsushi, the Blazing Sky If we go by token generation alone, Atsushi, the Blazing Sky is just decent for its cost, nothing amazing
You know, cards like Isolate, Alpine Moon, Amulet of Safekeeping, Infernal Reckoning, Elvish Clancaller, Mistcaller, or Supreme Phantom which were all designed to be played in Modern or Legacy, or the Elder Dragon Legends which clearly had EDH and Brawl in mind
The mainstream spellslinger builds typically need to be red and/or black, since only those colors have access to the explosive mana rituals the deck needs
For some inspiration, check out Bobbie-Christines list, which I had the pleasure of being destroyed by the other night