I'm sorry but you didnt answer to my question. I've been playing this game for 3 years although i'm new to this forum. So when you set the max difficulty which is 112%, any nordic castle will have about 50-80 huscarls, 50-60 nordic veteran archer, about 30-40 nord warriors and veterans inside, and I know even though the difficulty settings are low, they will have the same number of troops but their damaging points will be different to you and your soldiers. for example, if difficulty setting is 112, a nordic huscarl can knock you down with two thrown axes or sometimes one. or if he hits you with two handed ax, one hit maybe enough to knock u out. but when the difficulty setting is low, huscarls have to hit you or soldiers several time to knock u out. do make I sense? so what was the case in your game? Same goes to rhodoks, one or two bolt of a rhodok sharpshooter will knock u down.
Actually I took up your challenge and now trying to conquer calradia in a speed-run, but with difficulty setting 112, i am not very sure i can or not. because when i started my reputation was just 10, in 15 days, i became a mercenary fighter for nords, 45 days i am lord with only one village. At the beginning just two hits of a looter hatchet was knocking me down, or one hit of a sea raider, so it was difficult to rise up, now i am knocking down small-medium size lord troops, but still, besieging isnt possible for me now.
cheers, and wish me good luck