Rhystic Study and Thassa's Oracle Survive Another Round of Bans
Leaning heavily on Tonys penchant for invention, Iron Man is all about making better and better pieces of gear, or artifacts in this case, by sacrificing one whenever it attacks, to let you search your library for a new one that be slightly more expensive
Kudo, King Among Bears This 2-drop Selesnya Bear cost and type and size is next
Baylen can turn your tokens into near endless mana, buff himself up to deal lethal damage, and draw you as many additional cards as you need
Beyond that if you were going to experiment to fit your meta or preferences, I'd start here
While Stack of Paperwork is on the battlefield, this assignment is put onto the stack as a single game object controlled by no player, and all damage is dealt as assigned as that object resolves