Who danced each move in Dice best? 

NMIXX are all such amazing dancers I'm not even kidding. I was extremely impressed even though I still think O.O shows off their ability even more. This just confirms it. Here's what I noticed about each member if you're curious.
Lily
Great energy and very aware of the dynamics of the dance. Her strong hip movements are particularly noticeable to me. She could improve in the awareness of her whole body with small details in her hands and head specifically.
Haewon
Amazing control of her body especially with balance in squatting positions and fast torso movements. But even technical things like the floor work or quick hand details are great too. Just really sharp and sturdy. There are really very few consistent weaknesses. I do find her timing to be an issue sometimes though, mostly her starting a move a touch early
Sullyoon
Strong awareness of her shape and the angles she's presenting to the camera and focuses on nice fluid motions. Faster movements get a bit messier though and she sometimes has to cut details to get all her hits
Jinni
Powerful energy and especially good leg/footwork. She could add more details to enhance things and add her own style but it's very solid overall and she basically does everything right. Her sense of musicality is quite notable.
Bae
One of the strongest with the faster motions this time and she really sells the vibe of the dance. Her fluid hip motions with great accuracy particularly impressed me. Her dance break was also notable I couldn't not show Kyujin but Bae was a close second
Jiwoo
One of the fave energies for this dance she really gets the stiff doll vibe and then switches to the crazy powerful vibe pretty flawlessly. One small thing might be that she seems more aware of her upper body than her lower, rarely messing up any upper body moves but sometimes not so accurate on the bottom such as having great hand motions and straight arms but maybe not angling her legs or bending her knees enough etc.
Kyujin
I mean...come on. Kind of...perfect this whole time I can't lie. She really suits this vibe and is having a lot of fun with it. She's very aware of her body, adds lots of fun extra movements and flairs that still suit the part of the song, she's got good balance and fluid motions. Even if she's not doing THE best, she's usually one of the best