I know I usually don't show up here much, but a recent event, and the associated thoughts that come with it, have kept me thinking about Constance's personal skill, Circadian Beat. The common consensus is that she cannot get much benefit from the defense boosts that come with sunlit maps, but appreciates the offense boosts from being in shade.
This is where the thought experiment of a sort comes in. Which unit or units would benefit the most from Circadian Beat, meaning that they would appreciate the offensive or defensive boost roughly equally? While the spirit of this would restrict the choices to the Three Houses cast, I wouldn't be averse to seeing if it would fit someone from the Awakening, Fates, or Engage cast (since I've played those to completion. Echoes is proving to be a challenge.)
In that case, who would possibly benefit from daytime depression, in a way?