User blog comment:SoulRise99/Chapter 526: August is the REAL child of Zeref and Mavis; as well as the WEAKEST Mage in Alvarez!?/@comment-156.26.116.72-20170313152838

I wouldn't exaggerate to that point. He can easily overcome his weakness against someone like Lucy who is far inferior than him. He has spells in his own arsenal that are overpowered that can one shot Lucy. The advantage of his copy/nullifying magic is just not applicable to Holder Type magic, but he has plenty of OP caster type spells. Such as when he re-used Jellal's meteor, used the force field to block Laxus's attack, and that sleeping spell he used against Brandish. Even that laser he used to shoot through Mirajane will likely be enough to defeat Lucy.