Set a choice to allow for multiple inputs and work off of a dedicated point type(dd). Set it to work off of two different score values, one that is permanent and another that only works when the multiple choice point type reaches a specific value (or higher), allowing the score to change points taken(aa) based on how many times you choose that option. It can skip the point value it's supposed to work at, based on how how it is set up, creating permanently missing points from the point type(aa) the score is supposed to alter.