Well, Kazou is the character of anime trope I really grew to like.
Which somehow, I think cannon Naruto never had!
And deception and all that is very ninja-ish, and it's very eastren philosphy, so if chakra is actual tangable thing, maybe even karma.

And you know, Usagi and Kimiko losing, benefit them roleplay wise, I think much more then another win.
I can narrate it, if you are ok with it.
We can have it the other way, I just feel that narrativly, Kauzu winning has more benefits to the story.
If Kazou wins-
-Pretender complex for Kazou getting worse.
-Kimiko's ego get a hit.
-Usagi's ego get a hit.
(Maybe they even become a bit superstitiouse?)
Also, the theme, that not always stronger is the winner.

If they win-
Kazou's pretendet complex weakened.
Kimiko- still know she awesome.
Usagi- still know she awesome.
Maybe character growth for Kazou's team?
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To me sound well.
I also kind of want to see Odayama washing dishes