I have had great success with mine, both in duels and smaller group action. I can go toe to toe with any class, with fantastic sustain and amazing burst potential.
For me, the key is to build like a Dragon knight, not like a Nightblade. The more I crafted it for hand to hand combat as opposed to stealth burst, the better it did.
Basic details:
Arena set is key. Your mitigation comes from dodge, cloak and shields, very little blocking. Breaking out of stuns with Arena costs much less than blocking damage plus incoming stuns. The rest is up to you but Arena is a must.
Main bar is 2hand, set up like this:
Rally (heals plus damage increase) Focused Attacks (Stam regen and assassin class Crit bonus modifier)
Execute (for executing!)
Crit Charge (Main burst)
Dark Cloak (Main protection skill, purges and allows damage less repositioning)
All in all that bar giveat you heals, regen, huge burst, high mobility, a dot purge and damage reduction.
Essential 2nd bar is sword and board. This is your pressure, defense and sustain:
Mass Hysteria (how you drain stamina from enemies)
Puncture or Reverb bash (armor or health debuff)
Elude (dodge chance op)
Shield charge (damage, damage mitigation and stun)
siphoning strikes (sustain)
When fully buffed, I get about 180 Stam regen, 2500+ stamina, 3k health and about 1700 magica.
With this build I can sustain 1v1 practically forever. I've had duels versus DKs and Templars that go on over 15 minutes. In a small group you bring stuns, sustain, debufff and hugggge burst, even specced for regen I Crit charge at a lower end of 750 and up to 1400.
I hope this helps any who want to build an in your face NB out of stamina, played right it can go toe to toe with the best!
Well, I normally run dw/bow or 2h/bow stam builds... but I've been doing that since beta...
So, yesterday I started toying around with a medium armour, stam, dual s+b build utilizing blocking and dodge / miss chance % as my defence.
5 pieces histbark, 4 ashen's grip, 3 shadow walker jewels.
1rst bar: Dark Cloak, Invasion, Concealed Weapon, Absorb Magic, Sap Essence
Ulti: Devouring Swarm
2nd bar: Dark Cloak, Mass Hysteria, Pierce Armour, Evasion*, Blur
Ulti: Soul Tether
*I've just discovered that histbark's dodge chance and evasion's aren't currently stacking... but ZOS are "looking into it". So, I may change that out.
I'd say, so far... it works fairly well. It certainly a lot easier to manage my resources than my usual builds.
My survivability is way, way up... but I'm not quite as lethal as I used to be.
It's a fun alternative, though, to the usual stealthy assassin builds that I normally prefer.
@ Satiar : I just discovered how powerful rally is thanks to your post
Until yesterday I was using the skill but did not morph it as the description was vague and the only heal number you see in it is 89 at the end of rally (which is pretty useless)
Truth is upon reactivation after 10-15s or at the end of it, Rally usually heals me for 1100! Muuuch more interesting