Still think that proper promts is the best solution for the reaction though, even if you know the damage number. Because it not only depends on the damage you're about to recieve but also on whether or not you're planning to use your reaction for something else this turn, not matter the damage (aoo for example). Presets just wouldn't give strong enough control.
Many of us keep repeating this for at least year and half now ... every time this topic rise again.
