Just thought of a fun game of fractionation. You have a subject and two hypnotists. All three people are in a voice call together, and the subject has their webcam on and is occupied by something and/or trying reach a goal (could be a game, show, a book, etc.). One hypnotist is trying to keep the subject in trance, while the other is trying to keep the subject out of trance. However, both hypnotists have each other muted and cannot hear each other, so only the subject can hear them. You could mix this up by having everyone have their webcam on, so the hypnotists could also bait each other by mouthing words or silently mimicking sounds.
What you end up with is the subject trying to reach a goal with a hypnotist trying to prevent that from happening, while the other hypnotist is playing bodyguard and trying to help their subject.
Give the subject a goal and set a time limit, and watch as their brain just melts.
Ideas for possible goals within a time limit: complete a level or quest in a game, read a certain number of pages in a book, recall and/or summarize what happened in an episode of a show.
If you try this, please let me know how it went, and have fun!