@DEALER_Ace I, do in fact still live.
I have decided against trying to write that oneshot we had discussed after some thought, JJK just isn't really my cup of tea and combined with my own limited desire to write in the first place, I just don't think it's feasible anymore. Maybe in the future if I ever get back into writing like I used to, I'll give it another shot but for all intents and purposes, it might be best to just give up hope on me writing it.
You're free to use the details of what we discussed to make your own spin on it, I'll even share what I was thinking for writing it. I had it that the monsters are essentially the inverse of cursed spirts, beings composed of positive energy and Chara would expand on Reverse Cursed Energy into it's own attack style, much like Gojo did with his Red. Of course, this also means that Chara was a much more extreme threat since every time their techniques would clash against a regular cursed energy user, a mini purple would happen every time.
The key to beating Chara was to effectively lower their energy enough so that they can't escape from the reader's domain and then luck into victory since the mini purple Chara would create inside the domain would always be enough to break through, I was thinking of putting like 3 domains attempts altogether, the 1st to show Chara breaking out of the gambling zone, 2nd right as it looks like Chara is about to open their own domain, resulting in a massive explosion that nearly takes out the Ruins entirely and one final desperate domain for that jackpot to recover from near death after the explosion.