Riposte + Warning Cut alone would be great.
With all those dodges and high Agility, even better.
Mind Matrix's primary use is this: You have a demon that fills a specific role (say, main healer), and find another demon that fills the same role but even better, and want to quickly transfer the key abilities for that role over from the old one to the new one. i.e.: You have an awesome Faerie healer, but finally recruit a Pixie... or you already have a trained up Pixie, but find a modified Pixie with better resists/stats.
It's a bit of an esoteric item, but if you make it to the mid-game, you'll probably be able to find a good use for it.
Ghost Bite's range is only 2, but being able to go through other allies/enemies is what makes it shine. It's by far one of the cheapest ways to get your back row able to do damage in a hallway encounter, particularly physical damage that can carry passives like Infectious. (Usually if you're doing "smite" damage, it's a magic type.)
Looks like you have a good core team of Chindi, Ghoul, and Jiang Shi, backed up by two more healers (Faerie, Gandayah) That gives you up to 3 solid melees and up to 3 solid healers, so you should be flexible enough now to deal with a variety of encounters. Ranged attacks and finding damage dealers not Weak to Light would be nice though.