Seriously...? Dk is still the most op class?!
What about nightblades? Do they stand a chance?
Stam DK is a safe choice because your survivability is very good (less likely to die) and your sustain is alright too. They definitely don't have the burst to finish people off easily though, and all the DoTs in the world won't make a difference versus a templar.
Its probably stam sorc. While top tier players and destro sorcs will counter dark deal often, you're still gonna be able to get some stam sustain and burst healing from it, surge+dark deal unties you from the terrible 2h skill line and allows you to run a build with insane pressure and solid burst.
I'm not willing to argue against stam DK though.
Honorable mentions: mDK and mag sorc. Both have very specific, strong, weakness, but when you get accustomed to dealing with said weaknesses they can become very deadly.
I'd say mDK is a good class to make for duels though, they're very strong as is, completely shut down ranged builds(mag sorc/nb), they're presently in a decent place but in line for buffs that will likely put them over the top next patch. Also, the animations for mDK are just so visually pleasing and the array of hard/soft CC is just great.
This ain't the "Ugliest race of Tamriel" thread.
Definatly not a Nightblade. These guys are good at killing enemies fast, but as mentioned here before, this only applies when they have the element of surprise. Something that's hard or barely possible to have in an open duel.
Best is probably stamdk because they hardcounter all ranged builds with wings. But seriously, all you need is heavy armor, vitality pots and Redguard, it makes every class OP as ***.
Since homestead maybe petsorc is the strongest. Almost unstoppable range burst damage. But honestly you can successfully duel on each class \ spec.