I have no idea why I didn't pursue this combo a lot sooner, I've had the sets for a while but I've always paired each of them with Hundings, which has literally been a default set for years since I was able to craft 6 traits. But when I finally tried the build I was kinda surprised at my stats I ended up with.

(Stats shown with Weapon Pot, Berserker Enchant, and Surprise Attack cast)
Khajiit Stamina Nightblade
Mundus: Warrior
Sets: Draugr Hulk, Leviathan, Sellistrix
Weapon 1: Drodda's Withering Edge, Nirnhoned, Power Glyph
Weapon 1 Offhand: Drodda's Withering Edge, Sharpened, Poison Glyph
Weapon 2: Draugr Hulk Bow, Infused, Siphon Stamina Glyph
Head: Sellistrix, Heavy, Infused
Shoulders: Sellistrix, Med, Impenetrable
Chest: Draugr Hulk, Med, Infused
Hands: Leviathan, Med, Devines
Waist: Leviathan, Med, Devines
Legs: Draugr Hulk, Med, Infused
Feet: Draugr Hulk, Med, Devines
Jewel 1: Leviathan, Infused, Stam Recovery Glyph
Jewel 2: Leviathan, Infused, Weapon Dmg Glyph
Jewel 3: Leviathan, Infused, Weapon Dmg Glyph
Yes, it's very unoriginal and basic. Hulk for max stam and Leviathan for higher crit chance. Basically two things a Nightblade needs. My main fear was I'd hemorrhage Weapon Damage, but was surprised that even unbuffed I sat at a comfortable 3095. (If I can get my Weapon or Spell power at or above 3k, I'm a happy boy) I know I'm not min maxing, that there are people running around with 5k weapon damage or more believing that should be the standard, but I'm pretty happy with how this works out. I have decent weapon power, high stamina, and high crit chance, with workable stam recovery. I feel pretty well rounded right now.