Main Role: Damage
Health, Magicka, Stamina
Weapon 1: Dual Wield
Dual Wield SkillBlood Craze
Dual Wield SkillWhirlwind
Dual Wield SkillBloodthirst
Nightblade SkillRelentless Focus
Dual Wield SkillDeadly Cloak
Nightblade SkillIncapacitating Strike
Gear and Item Set Info
Don't worry about it until CP160. Wear at least one piece of medium and light so you can level those trees along with medium.
Focus on weaving light attacks between each skill use and using your relentless focus spectral arrow every 5 light attacks. Make sure to apply your damage over times (DoTs), use incapacitating strike, and then fire the spectral arrow for maximum damage.
This build doesn't take any special skill lines, so it's easy to level up.