Helldritch
Hero
Yeah.... SA is always crappy in my books. Non magical damage is supposed to be limited to... non magical. The smite ability is pretty much magical in my book. AMF pretty much neuters all classes abilities save a few from martial classes.We ruled (at the time from SA we found) that the 1d8 from the Improved Divine Smite of the paladin would continue to function while in the antimagic field, so that is probably the "weapon damage" you are seeing.
Also, in the first fight he as disarmed, so could only make unarmed strikes for 3 points each...
The heavy reliance of magic with classes and subclasses in 5ed is probably the reason that SA ruled this way. Otherwise, too much (sub)classes would be down the drain in an AMF.
Think about it this way. Can some one do the same thing without magic explaining it? No? Then an AMF should render it non functional.
Hey, I can't have a punch smitadin because a punch is not a melee weapon attack, but a monk's punch is... SA is pretty much useless in some rulings. But you took it as is. That was your call and I respect that. Good shot on that one.