My current character had been using the Mace of Molag Ball and Dawnbreaker to great effect, but the stamina cost is a pain - though armor enchantments can help with this.
However, at the moment I am using a Legendary Daedric Longsword with an absorb stamina enchantment and using the Blade of Woe in my off hand - this seems to be a winning combo as well.
What are the rest of you using?

Once I find another ebony sword imma have 2 with fire for when I have all mu soul gems filled. Kinda annoying seeing the No soul gems large enough or no sould gems empty message ALL the time...