Okay, the normal difficulty is definitely too easy at this point. It was already easy, but since I'm doing a new game+, I have all the statues polished or whatever so everybody's skills are leveling up faster than normal, and I spent some of my renown to get my professor level up to like B at the beginning of the game, so I've had lots of activity points, which means even more opportunities to increase their skills. At this point, most of the enemies I encounter do 0 damage to my dudes even if they hit, and they usually die in one hit. So it's not exactly challenging, but it is still kinda fun to just plow through everybody.
The exception to that is Flayn, who is pretty useless. She started as a priest but I wanted to make her a pegasus knight, but it's not really working out because she's extremely weak, can barely deal any damage, and takes a lot of damage. And it's hard to level her up because everybody else does so much damage that they don't leave anybody alive for her to pick off for the experience, plus she can't go anywhere near archers. I probably should just turn her back into a healer, except I don't really need one because my other dudes so rarely take damage.
Anyway I'm havin' fun