Feats for show Moiraine and Lan:
https://www.youtube.com/watch?v=iZXpGXdnUvE
Not sure if this was the case in the books, but live-action Moiraine seems to have quite a bit of start-up lag on her channeling, and actually needs specific motions with her hands in order to get going.
If this was limited to live action versions of Moiraine and Lan, as well as Yennefer and Geralt, how would things play out?