User blog comment:B214/Volume 23 discussion blog/@comment-77.188.219.183-20170424000940/@comment-58.137.25.62-20170424012356

Being smart doesn’t guarantee victory. in Vol.5, Sona was able to turn special rules to her advantage and gave Rias a hard time. but she still lost in the end. it was also mentioned that Sona was already defeated by a god-class team. if the difference in power is too far apart, even the best strategy won’t help you win.