Board Thread:General Discussion/@comment-25436862-20150610034332/@comment-5892594-20150610145851

Those 2 hokages were vastly inferior clones. Said Sannin got casually rekt by Sasuke. And Danzo was fighting Sasuke after 2 powerups. Surely you understand the differences in power of their opponents.

Furthermore, Hiruzen wouldn't know about Izanagi, and every reappearance is another chance for an instant death for Hiruzen, eho, unlike Sasuke, does not have an absolute defense.