They could always have the writers work a bit harder at adding things like enchanted swords, protective amulets and good magic to the good guys’ side. As it stands at least Cora had the sense to warn Hook against going up against Rumple’s magic with just a sword/hook. Then Hook finally picked a time when Rumple was without magic to attack. So it’s not like no characters on the show understand the problem inherent in swords vs magic.
I think Emma seemed to get it when she cast the second barrier, but she and Neal just didn’t have any other defenses after Cora got through that. Kinda a shame considering how much magical stuff Gold has in his back room, but I loved the reaction that Neal and Emma had to being teleported like that. So it’s all good.
I’ve seen that Aquaman spoof! It was very funny.
A little snarky comment from Rumple, Emma, or Neal (the resident snarkers) could be a nice bit of lampshading. “Really? You plan to take a knife to a magic fight?” “This is all we have to face them? You’re kidding, right?”