User blog comment:B214/Volume 22 spoilers/@comment-28087053-20170114184806/@comment-30924344-20170115091114

Since Ajuka and Sirzechs in their true forms are both 2x stronger than the orginal Lucifer and Beelzebub and Indra is 4x stronger than old Satans combined, that means Sirzechs and Ajuka have half of Indras power each at their strongest. It would take the both of them to take down Indra but they would be on par and Indra would most likely win since being a God of War, he has battle experience since the beginning of the earth's creation.