A mxtx crossover event where all the red-black characters had to fight, I believe, would result in a very interesting rock paper scissors scenario.
Wei Wuxian, being the Ghost Whisperer, could probably beat, or at the very least subdue Hua Cheng. We know Hua Cheng is weak to Ghost Stuff a la the Mount Tonglu opening incident, and Wei Wuxian has dealt with extremely powerful spirits in the past.
That being said, I think Hua Cheng could take Luo Binghe in a fight. This guy bested 33 heavenly officials, his swordplay is unmatched, and Luo Binghe is very powerful but I imagine that power comes with the side effect of very little finesse. Additionally his protagonist halo probably wouldn’t save him here since he’s not the only protagonist.
However, Luo Binghe would totally destroy Wei Wuxian. With his itty bitty Mo Xuanyu core he doesn’t stand a chance. Tearing through an army of the undead is the exact sort of op bullshit Binghe excels at, so that option is out too.
That being said, if their love interests are also fighting, Xie Lian bodies those fools. I’m sorry but even though Lan Wanji is excellent and SQQ is a peak lord, they do not stand a chance. Xie Lian’s favorite trick for 800 years was to break boulders on his chest while he had no access to any spiritual energy. Dude folded the heavenly emperor like a lawn chair. No contest.
