I know people the power ranking in the Alveraz arc was a mess and the Spriggan 12 should have taken more effort to defeat but I disagree. If Hiro maintained consistent throughout the story with all the characters the difference between Ishgar top tiers and the Spriggan 12 should have been small if not non existent.
With Natsu at this point he would have surpassed his Tenrou Island LDF Mode.
Also with consistency if he retained Laxus power he should have also retained Zancrow and Atlas flame power. Along with Jellals flame of rebuke. He gained these things in a similar way he gained Lightning flame mode.
So from a consistent and logical stand point of view Natsu burning away Zeref Magic was 100% okay. He should have easily been on Spriggan 12 level. However the way Hiro Mashima executed everything was horrible. There was no need for the 1 time Igneel powerup.
The last fight against Zeref would have been more logical to use his Atlas flame power to burn away at Zerefs Magic. His Gods flames to harm Zeref he revered himself a god and his Dragon Force to boost his overall power. Less BS because everything was established over 100 chapters before the fight. Even before the arc itself.
Atleast with Lucy she should have been at minimum Low tier Azir Spriggan 12 level.
Lucy at this point would have been atleast 10x stronger.
At atleast 75% power she can open 10 Zodiac gates without exhausting her power because she then goes on to open 2 more zodiac gates without fatigue.
This Aquarius Feat multiplied by 10 should be similar to Azir Sands of Doom.
Then you have Gemini who can replicate Lucy and her Spirit Keys:
The effects even after the transformation still remains.
Gemini as Gray Chapter 143
Happy still frozen after Gemini Disappears Chapter 145
So from a logical point of view Gemini should still be able to:
1. Summon the CSK themselves via a Gold Key.
2. Create a spare set of Gold Keys for Lucy to use.
Also I now people might say while Lucy isn't smart enough to figure this out. Yet Hiro portrays her as smart enough to rewrite E.N.D book and learn Fairy Heart within minutes.
Among this things you have other things like Combination attacks, Power transfer, etc.
This should have atleast put Lucy among bottom Spriggan 12 Tier Level. Emphasis on the word atleast.
Then you have Minerva who logically should have atleast been around Dimaria level.
Dimaria attack:
Minerva Attack:
Minerva however then got a powerboost in Tartarous:
Her Hax spacial magic was the same as Jacobs:
She can transport people to her private dimension and torture them.
Minerva should have been somewhere close to Dimaria in power from a logical stand point of view.
Then you have Wendy who has Dragon Force and With Enchantments should have atleast been close to Ajeel in power. Probably a little weaker but extremely close.
In Dragon Force her enchantment power should have logically increased and this she could have boosted her own power to be close to Azir in power. She could have increased her Speed, Magical power, Physical strength and Defenses.
Erza should have atleast been Low Spriggan 12 with Nakagami. It is extremely haxxed. It has the power to slice through all magic and an invincible sword.
Again emphasis on the word Atleast.
Not to mention she should currently have no issue wielding 200 Weapons at once since she got SO.
The difference between the Spriggan 12 and Ishgar was exaggerated. Had Hiro remained Consistent throughout the Manga Ishgar wouldn't have been at any disadvantage against Ishagar.