Help.

[caravel]

The Prima Strategy Guide lists the following difficultly levels for the Clans:

Mori ( Red ) : Medium
Shimazu ( Green ) : Easy
Imagawa ( Mid Blue ) : Medium
Oda ( Gold ) : Hard
Takeda ( Black ) : Medium
Hojo ( Purple ) : Medium
Uesugi ( Dark Blue ) : Hard

I'm afraid the Prima guide is perhaps somewhat 'misguided'. I would definitely rate Uesugi as easier than Hojo and Imagawa are definitely harder than both. Personally I also find Mori quite easy.

It would be interesting to see players rate the factions in terms of difficulty.