Principate
Saint Titanfall
Trying my hand at Hard. Ugh. It's... hard. Chapter 5 was hell until I went and did Donnelquest for some levels and the Rescue staff, and now I'm having trouble with the first Anna side story in the forest, I just can't make it up there in time _and_ stay alive. Every mission so far has taken me several attempts. Well, I wanted a challenge... I'm not using Frederick much aside from the occasional stats-support on a couple of maps, maybe I need to.
Do you always check enemy attack ranges using A button and check what enemies can attack which unit and their weapons? (obviously there's the weapon triangle to keep in mind and defence resistance), then there's also certain titles that give avoid defence advantages etc.
that's about all you really need to know to not have much problem with hard, you could also cheese but that's not much fun.