Quote Originally Posted by Tanarii View Post
Thrown melee weapons work with the Dueling Fighting Style, provided you don't have another weapon in your other hand.

Doesn't work with thrown ranged weapons though. Like the Dart.

Similarly Monk Martial Arts (use Dex to attack, get martial arts die for damage) applies to thrown simple melee weapons. But not Darts, since they are ranged weapons.
I think dueling with thrown weapons is another one of those up in the air Topics. I allow it but it's one of those things that DM if you have a player playing a pally who wants to throw weapons you can trottle damage. Is weilding defined in rules?

Another note, monks get to use darts as monk weapons at my table they need all the help they can get to survive first few lvs.