bantering doesn't seem to off on my games Karlach is probably a little quieter in act 2
guantlet of shar is Karlach, Shadowheart and Astarion .

Shadowheart and Astarion are always bantering about something Karlach seemed to speak up at the tiefling corpses
and shes chatting about Dammon everytime we go to the inn.

Shadowheart talks a fair bit in Rivington not noticed so much in the city but that place has dialogue everywhere so I may just be missing it .

Karlach bearly shuts up in act 1 Shadowheart/Astarion are her reply buddies.

Minthara is completely busted at the moment as I haven't got the update as I'm on Xbox I have to play her she sometimes sends out the odd sentence but I've not been in that game for about a week to fully listen to her.
12 characters on the go I'm an Altoholic