This build gets huge sustain from the Gaze of Sithis, Wretched Vitality, The Atronach mundus and Jewels of Misrule food.
Clear your attributes, wear all the gear and eat the food. Then add points into health until you are over 32k health. Put the rest of your points into Magicka. Your magicka and stamina are low but recover quickly - you should never run short. Most of your offensive potential comes from penetration and weapon damage.
Keep your buffs up from the backbar at all times: Hardened Armor, Cauterize and Igneous Weapons
When you engage in combat use Shielded Assault as your gap closer and then hit Race Against Time. This will proc both of the sustain bonuses provided by Wretched Vitality.
Shielded Assault has a good chance to stun your opponent. Switch to front bar and whip to set them off balance and change your whip skill into Power Lash which is cheaper and heals you every time you hit. Use Burning Embers to put more pressure on them and give you a heal over time.
When opponent is under 50% health switch to Reverse Slice to execute them.