by Thanee
I think it would make much more sense to rate the difficulty in terms of the scale as given by FFG (1-3 = easy; 4-6 = moderate; 7-9 = hard; 10 = insane (aka Dol Guldur)).Since I have played only four scenarios so far, I can only give my opinion for these (sDL = solo Difficulty Level).
Passage Through Mirkwood - sDL = 1
Journey Down the Anduin - sDL = 7
Escape from Dol Guldur - sDL = 10
The Massing at Osgiliath - sDL = 7
Bye
Thanee