Him having a spell that can partially destroy the Clover Kingdom doesn't mean he has the physical strength to do so. That technique was stopped with another magical spell, not by brute force. Brute fighters from that verse like Yami aren't anywhere near Natsu in physical stats.Licht's swords have anti-magic properties, they can cut and nullify magic.
Licht was powerful enough to destroy the clover kingdom which is hundreds of kilometres wide, his physical blows should scale to the power of other people on his level and his other attacks.
Not every single sword of Licht has anti-magic properties. Asta's demon gave that attribute to three of them, but Licht only ever claimed one sword with those properties. However, it's a sword with a poor edge that lacks proper cutting feats: the feat you posted isn't anti-magic. That was Licht absorbing the magic from everyone around him into the sword and then shooting it out into his opponent. He doesn't have long-range anti-magic, and shooting Natsu's fire back against him wouldn't hurt him.
It comes down again to Licht's physical strength, in which he's lacking even against base Natsu. If Licht can go all-out in this fight from the beginning, so can Natsu. Natsu has experience against both speedsters an anti-magic users, so while it can be an interesting fight, I still see Natsu winning it.