The 2-prize duel in the upper room is absolutely brutal since it actually uses a legit strategy and a pretty decent decklist containing Scyther, Wigglytuff, Mysterious Fossil (+random evos)/Clefairy Doll and at least 3 Bill and Oak from what I recall
This deck can give you that flexibility to adjust your gameplay to maximize the fun
Reddit user u/keatsta did the maths for us, and Ill be going through some of the data below
Sometimes, you wont be at all using the card as an answer but as a means to simply end it
Jhoira's Familiar AND Ugin, the Ineffable The four-drop Familiar with flying and 2/2 size in colorless form is first
Xu-Ifit, Osteoharmonist Xu-Ifit, Osteoharmonist reanimates creatures for free, but it strips them of their abilities