At least with a AOE Night Blade
i created 2 characters, both Night Blades
both use a AOE build but one uses Light armor and magicka focus and the other uses medium and stamina focus.
Both use Dual Weild for steel tornado, Power Extraction, Siphoning Attacks for endless aoe spam. Using a staff on the mage one would only weaken the build since the addtional AOE that uses stam is better as a backup to power extraction than using Impulse and getting lower ultimate generation. also the mage version easily runs out of magicka and without the Stam AOE becomes a sitting duck.
On my mage its mostly spam of Power Extraction for damage, hitting 300+ on crits on up to 9 targets, if MP gets low i pop out a few steel tornados... Inner light and Mirage are used as well.
On the Rogue, Its mostly Steel Tornado spam, using Power Extraction at the start of fights purely for the damage boost and on the rare times i run out of stam.. Steel tornado seems to hit around 300 on 100% enemies... and i have seen over 1k damage on low HP enemies in these tests. Elude and Ambush are used as well.
In both situations i am blocking the entire fight. even when Steel Tornado is the primary spam, Siphoning attacks keeps the Stam up. Additionally the Ultimate of choice is Soul Tether, due to How easily these aoe spams can get ultimate allowing the stun effect to stunlock enemies and the powerful (likley bugged on PTS atm) heal which is hitting up to 1.7k per tick amazingly (seems directly releated to the weapon damage boost from power extraction if anyone else wants to experiment and confirm)
Amazingly its the Rogue that seems to do better damage have has better durability it seems.. Holding 2k+ easily vs groups and taking little damage in return thanks to Eludes effectiveness. Ambush is also very nice to open up from stealth for the armor bonus, and it gives me a few seconds to pop out the starting ultimate and power extraction.
i am actually having lots more fun with the stam version Night Blade currently than i am the Magi version. I just might have to switch my Live NB back to stam when this update hits!
I play every class in every situation. I love them all.