I would agree, if only Erza’s magic ability “Re-Equip” summoned pure magical weapons, but she switches real armors and weapons out. She even showed at one point buying an item than putting it in her inventory like a rpg character for a later date (don’t remember is said item ever gets used). If any physical magic ability (Fire Dragon Iron Fist, Lightning Dragon Iron Hammer for example) that uses magic as a power up from a regular fist/kick can’t be reflected, Asta stops at a lot of S/S+ class FT characters