I played as a mage also. I found the Draugr Deathlords very hard for a long time, even with the full knockdown shout. They just deal so much damn damage in a single hit, and it's not always possible to run around them.
The sorcerers who drop the masks give me the hardest time as any class. Only once was I able to exploit stupid AI to keep him moving consistently instead of shooting. The rest of the time, it's run in, hit the guy once, run away screaming in pain, heal up and do it again.
Dragons can be counted on to fly around a lot. Always time to heal. I don't find them that difficult.
The sorcerers who drop the masks give me the hardest time as any class. Only once was I able to exploit stupid AI to keep him moving consistently instead of shooting. The rest of the time, it's run in, hit the guy once, run away screaming in pain, heal up and do it again.
Dragons can be counted on to fly around a lot. Always time to heal. I don't find them that difficult.