So, are Dremora Lords, Wrathmen and Atronachts viable in Solstheim? Or do they just fall over and die when hit?
What are your eperiences? What summons do you actually prefer?

My current mage has the ability to summon the Dremora twins, however I never use that as it they are way overpowered and remove any sort of challenge. My prefered ally is a summoned storm antronach who along with my follower can get me through most situations whilst still keeping battles challenging. I find this approach more than ample to get through Solsheim.