Thought I'd just mention, since Prone is being discussed here, but bear in mind how Prone is currently coded in BG3.
(
https://forums.larian.com/ubbthreads.php?ubb=showflat&Number=754684&page=1) This is the list detailing status conditions in the game currently and how they work.
The short is: Prone in BG3 is also Unconscious and Incapacitated, currently (this is why it automatically ends your concentration without a save - you become Unconscious when you fall over), and auto-dispels on your turn because you are forced to stand up right away. Unless that changes, there's no way to actually utilise prone in this game.
