I think the tier seven is a bit mixed up. I think Aizen ought to be meta human and FGT Ichigo as well. How could the likes of Mihawk rank above them? Consider that Aizen can casually nuke areas, regenerate vital organs, create hax illusions that are not able to be dispelled, fly, travel between dimensions, cast numerous spells including space/time warping, is a spiritual being, can kill mortals and destroy inanimate matter instantly upon them coming in contact with his aura, and is immortal, among other abilities. Mihawk's most impressive display thus far has been splitting a giant iceberg in two with the mere pressure of his sword swing without actually slicing it, which is impressive but doesn't top Aizen.