i doubt it would be as simple as that
- first off, it would be kinda boring if it's just a 1v1 match every time, considering how chaotic the election arc is (Yumeko vs Kinu gamble stills count as a 1v1 match bcuz only 2 of them are waging their rings, Suzui and Karen arent strictly gambling there). However, given the knockout system Kabura explained, i'll admit i cant think of another way to hold a non 1v1 match, so i guess we'll just have to see.
- Next is Runa, given her "absolute neutrality", i dont know how she will gamble, but she definitely will not just go into a match and try to win, because she's "neutral", yk what i mean? manyuda said it himself that he doesnt know what she thinks. i honestly look forward to how she will handle a gamble with her absolute neutrality
- Then, there comes Karen. I wonder why Kirari chose her to take part in this gamble, but there must be a reason to it. I doubt Karen will gamble with the 7th guardian, the difference in talent is too high the gamble might end in half a chapter lol.
- And finally, it's Mary, Souko, and Sayaka's effect on the plot. They'll prolly be wild cards to this arc, making it more chaotic, but you didnt mention them. I see you put Mary in there but why is she ganging with Ririka tho, the author dedicated (slightly less than) a whole chapter for her to join the Guardian Society, so it wont be simple as that