I'm only playing on Normal since my experiences on Hard in Vanilla made me very nervous. Sounds like i'd get roundly kicked if I went up to Hard difficulty.
Normal is manageable for me. I start as the southern Minamoto, befriended Takeda and the guys to the west, allied with Nitta, and expanded eastwards. Eventually the northern Minamoto guys simply absorbed the Takeda and those guys to the west of me, where Imagawa are in Vanilla. So now I have a brother at my back, and i'm pushing east to wipe out one of the Fujiwara clans that DoW'd me. I'll worry about Taira later.
I have the Hitachi province cranked up and ready to produce high accuracy archers. I'm trying to push into Fukushima to form a firewall from the northern provinces. Nitta holds both Kozuka and Shimotsuke provinces.