So I was looking at all the characters' strengths and weaknesses just to plan out what I want to prioritize, and I started thinking about some ways to mix it up if I replay one of the houses. I came up with a way to make a more challenging run that might make up for the lack of a Lunatic difficulty (I'm not actually sure about this, I've just only seen people talking about Normal and Hard).
Introducing: Weakness Challenge Run! Basically, this challenge run revolves around instructing students to focus on the skills for which they have a weakness (i.e., Faith for Edelgard, Reason for Dimitri, etc.). There are only a few rules to follow in order to make this run a challenge:
Obviously, the point of this run is to level up weak skills, so you can only instruct students to work on those skills. For example, Petra has to focus on Reason and Faith, while Lorentz can only focus on Brawling.
If a student has no weaknesses (Ingrid, Ferdinand, etc.), you have a bit more freedom of what to have them focus on, as long as they don't focus on their strengths. However, just to keep the difficulty the same for every character, you cannot individually instruct a character with no weaknesses.
If a student has a hidden talent in a skill they are weak in, such as Dorothea with Faith, that skill can not be improved. This is because it becomes a strength once the hidden talent is acquired, which would ruin the point of the run.
So yeah, that's the Weakness Challenge Run! It doesn't have much replayability within the same hosue, but it's a nice way to mix it up with some added difficulty. Let me know what you guys think!