User blog comment:Yuri Rozu/Laxus Dreyar vs Mirajane Strauss/@comment-121.54.58.236-20160123040727/@comment-27281341-20160123145957

I believe that Macro has it's limitations. Whether you can't use it on someone more powerful than you or you need to use more power for it to affect someone stronger than you. If you have to use more power against someone stronger than you then you could possibly exhaust yourself before your opponnent can fulfill your order. In any case, Macro has only affected Tartaros arc Erza and that was Seilah's feat, who had more power than Mira. Current Laxus is 1 or 2 tiers above current Erza, who is 1 tier above her Tartaros self. Mira has powered up herself but she we can't assume she can use her Macro on anyone above her.