Originally Posted by Vengeance

Ummm no. Yamamoto's greatest weakness is his compassion for his subordinates. If Yama were to go full power against Aizen he'd simply obliterate the surrounding area within a 10 mile area. But at the same time everything in that area would be completely obliterated. The only way Aizen would survive is if he isn't even there to begin with. By simply turning on his banki Aizen can't even touch Yama let alone survive in the same area as him for an extended amount of time. So more deadly I think not dude.