User blog comment:Xilinoc/Ch. 578 (I'm not gonna spoil the title like Schiffy did)/@comment-6963992-20140423223414

Unless Gremmy dies instantaneously I don't see why he can't heal himself. Also, I think he was the strongest in the raw power department because he could simply imagine himself with more power. BTW I wonder if kubo didn't allow him to go vollstandig for the same reason he doesn't allow some shinigami to use bankai.