Thanks Tai, you were right, these were missing. A monster that powers itself up now shows it the way the original game does: a burst of light on the monster as it casts, and a small sign over its head (a sword for attack up, a shield for defence up, and so on) for as long as the buff lasts. Two honest limits for now: some monsters, the Stone Golem among them, do not yet have their casting pose, so they show the light and the sign but stand still while casting (the Mixed Golem has the full pose); and a monster's heal does not show a sign yet.