JAIF

I don't know. We don't have absolutely anything to grasp the limit of Quincy Final Form. We simply don't have anything to base our assumptions on. He simply vanished and reappeared, cutting off released Mayuri's arm in the process, then proceeded to wipe out his Bankai in a single shot.

On the other hand, Arrancar arc Hitsugaya in Bankai should be more or less close to Yammy's unreleased state, against which Ichigo immediately pulled out Bankai - and not without reason, seeing his performance against Alessandro Dordonie, and that was after a substantial training session - which Ichigo was a great deal ahead of the shikai Ichigo Kenpachi had equalled, whereas a Kenpachi with his eyepatch on had been a deaththreat to Mayuri. So I envision Hitsugaya with Bankai would be somewhat equal to Arrancar arc Shikai Ichigo, who would be much stronger than no-eyepatch Kenpachi, who in turn would be much stronger than Bankai Kurotsuchi, no matter how you look at it. Hitsugaya in Shikai wouldn't fare too bad against Kenpachi without his eyepatch, and he could definately overwhelm him with it still on. So it's safe to say he could defeat Mayuri's Bankai, but with what ease, I do not know. Of course, he was stronger in the Arrancar arc than before as well, so that makes me question it further.

I think Ishida in his Quincy Final Form is definately stronger than Hitsugaya in Shikai, but its upper limit is not clearly explored. Perhaps he is weaker than his Bankai, perhaps not. There's not really a way to tell, yet.

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