3-way toggle: pop-up prompt / use automatically / don't use
Ideally with the ability to change that toggle even if it isn't your turn, in case you accidentally forget to put it on the right setting.
In this implementation using triggers, ideally you'd also also be able to select a character for the trigger to proc on, even if they're currently not visible or targetable from your position. I.e., "I only want to counterspell/attack this enemy. If they remain behind cover, then I guess I can't do anything. But if they move from cover into my sight...gotcha!"
Sure, that sounds good.
