Wait until you fight Hevnoraak. That basard killed me in 1 shot a few times. I had 250 hp and 15% magic resistance from Agent of Mara and he Killed me in 1 shot. I was playing on master. Seriously though that is some serious magic scaling.
And about the Draugr, there was a certain thieves guild quest I was on and I'm not joking, 90% of all the Draugr in the tomb were DEATHLORDS. A few scourges mixed in. I was in my late 30s with low combat skills. I was a THIEF not a fighter, and here I was expected to get through there. I did after over a dozen reloads. I couldn't sneak with my moron companion engaging in ever fight.
I know exactly what pace you are talking about. I had a similar character which i usually sneak past things with, but my companion was very clumsy. "Look, a trap. Dont go into it" and the next thing you know he has walked in to it himself

I used an unarmed khajiit. I had to cleverly use kiting and traps to get through.