I reached level 20 and ever since then the difficulty curve has gone up exponentially (like a lot), and I'm only playing on Adept. Dungeons are really hard for me now. Though it might be that I just suck, I don't know. Also I have Orchish/Dwarven armor and a level 66 one handed skill, 53 destruction, and like level 50 heavy armor, and I mainly use the Mace of Molag Bal.