He is the problem with these quotes is that feats speak otherwise.
Mirajane Water Attack:
Lucy Water Attack:
Lucy has shown way better and both of these feats are Pre 7 Year Time skip. Not to mention this was a serious Mirajane versus a non serious Aquarius feat, As far as water Control Lucy had a far superior advantage and power.
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Pretty much equals in this case. I will give Mirajane SE the slight edge due to the fact Freed was said to be the strongest of the Thunder God Tribe. However if you take into consideration Regulas impact Knocked Bicklow unconscious while SE only knocked Freed out of his demon form. Although with that arguement Urano Metria would outclass SE because Angel was hyped to be stronger than Freed.
We are still using Pre 7 Year Time Skip Feats from both parties.
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BSS Kick vs Regulas Punch. The former sent Azuma flying a few feet away while the latter sent Capricorn flying in a wall. Even if you want to argue well Azuma is stronger, Capricorn got a punch on Hades who far superior to Azuma.
One blow up a few trees and the other blow others to oblivion.Equal in attack power to me.
This is all still Pre 7 Year time skip.
Now let's Move onto Post Time Skip
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Basically I picked these images to show that Lucy had better showings in the Tartarous arc. Lucy tanked an attack that was more powerful than the one Mirajane was hit with. Then Lucy was nearly drained of all her strength, Yet she still had enough power left to send her Spirits back the same way Mirajane took over Sayla. Then Elfman and Natsu proceeded to finish them off.
The difference though is Mirajane barely had enough strength afterwards to battle Sayla while Lucy went on to face off against Torafusa, Jackal, lamy and Foot soldiers before summoning the CSK to destroy Plutogrim and face off against Marde geer.
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So Lucy has not only more power but also more stamina than Mirajane. Even after having nearly all her energy drained by Franmarth Lucy went on to fight against Torafusa, Jackal, Lamy and foot soldiers. Not to mention Summon the CSK. Were as Mirajane could only last a little while in her BSS.
Once again this is all Tartarous arc feats.
Now let's move on to Alveraz Feats.
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Mirajane put fodder to sleep while Lucy undid Jacobs Transport Magic.
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Push Back Irene Lackeys versus Pushing back Spriggan Brandish
Despite claims that this attack dwarfs tress, it doesn't. You can legit see Mirajane in comparison to the cloud of dust. Unless Mirajane is the size of a tree I doubt the attack is drawfing trees and some even claimed mountains.
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So overall Mirajane hasn't shown anything that is more impressive than what Lucy has shown. Point blank period. The only reason people rank Mirajane so high is because they find her magic cool and the hype that she was ONCE a LONG time ago equal to Erza in power. Because Mirajane doesn't posses any feats that would put her above Lucy.