Yes, NBs can tank. Any class can perform any role roughly as well as any other class.
Unfortunately, I've never done it, so I don't know any particular builds.
"The Nutella Nightblade" - PvP Build
- 5 Set Hist Bark
- 5 Pieces of Heavy Armor with Impenetrable, Enchanted with Health/Magicka
- 2 Set Malubeth's Scourge
- 2 Pieces of Light Armor with Infused, Enchanted with Stamina
- 3 Set Dominion's Potentate
- Sword/Shield + Neck, with Defending/Impenetrable + Healthy, Enchanted with Disease/Health/Block Cost Reduction
- 2 Set Cyrodiil's Light
- Rings, with Arcane, Enchanted with Spell Damage
Main Bar (Sword/Shield)Off Bar (Restoration Staff)
- Swallow Soul
- Sap Essence
- Absorb Magic
- Invasion
- Siphoning Attacks
- Ultimate: Veil of Blades
[Attributes]: 16 Stamina, 16 Health, 30 Magicka.
- Refreshing Path
- Rapid Regeneration
- Structured Entropy
- Cleanse
- Unstoppable
- Ultimate: Soul Assault/Replenishing Barrier/Soul Tether
PvP build, works fine in PvE, just change up skills as you go, won't need Unstoppable or Cleanse on the second bar and going to need a taunt on the main bar, I've tanked every vet dungeon and 20+ people in Cyrodiil with this build, it's never failed me, not yet anyway
I've tanked everything in the game with my nightblade. It works fine. (Though you may need to get good at burst healing yourself up with a resto staff if you want to tank vDSA.)
I currently run 5 hist, 5 footmans, and 2 Bloodspawn.
What I have on my bar can vary from fight to fight, but in 1.6, a shadow ability is a good idea in order to activate shadow barrier. I recommend path. Shades can work if you don't plan on using low slash for the debuff.
Sap + Siphoning Attacks will get you through any AOE pull with ease.
Absorb magic, mirage and immovable are all good options to look into.
Also, my associate Panda244 posted this build."The Nutella Nightblade" - PvP Build
- 5 Set Hist Bark
- 5 Pieces of Heavy Armor with Impenetrable, Enchanted with Health/Magicka
- 2 Set Malubeth's Scourge
- 2 Pieces of Light Armor with Infused, Enchanted with Stamina
- 3 Set Dominion's Potentate
- Sword/Shield + Neck, with Defending/Impenetrable + Healthy, Enchanted with Disease/Health/Block Cost Reduction
- 2 Set Cyrodiil's Light
- Rings, with Arcane, Enchanted with Spell Damage
Main Bar (Sword/Shield)Off Bar (Restoration Staff)
- Swallow Soul
- Sap Essence
- Absorb Magic
- Invasion
- Siphoning Attacks
- Ultimate: Veil of Blades
[Attributes]: 16 Stamina, 16 Health, 30 Magicka.
- Refreshing Path
- Rapid Regeneration
- Structured Entropy
- Cleanse
- Unstoppable
- Ultimate: Soul Assault/Replenishing Barrier/Soul Tether
PvP build, works fine in PvE, just change up skills as you go, won't need Unstoppable or Cleanse on the second bar and going to need a taunt on the main bar, I've tanked every vet dungeon and 20+ people in Cyrodiil with this build, it's never failed me, not yet anyway
I also have a few nightblade tanks in my guild who runs some different things. But we all like changing it up from time to time.