User blog comment:B214/Volume 23 discussion blog/@comment-31137559-20170321042248/@comment-1359322-20170321053354

First off, Rias didn't tag with Akeno, Akeno fought the Queen while Rias fought the King.

"So Rias's team has 3-Longinus-level SG user. The match doesnt end there. Rias is fighting enemy King (Ultimate class Devil) and is overwhelming him with her power of destruction. Next to her is Akeno in Fallen-Angel mode who took down the enemy Queen."

Second, Rias has been fighting alongside Ise against Khaos Brigade for the entire series now, she doesn't fall behind in terms of accomplishments. Just because Rias didn't beat any big names doesn't mean her accomplishment is none existent.