User blog comment:B214/Shin DxD 1 discussion/@comment-30230931-20180804194539/@comment-28884330-20180806225742

Baraqiel could only pull off that move because of the particular rules of Object Break, and Dulio has trapping capacities on his own and the plan was made by a Rating Game top-ranker, not him. Rias does not have any of these advantages on her team, so the only way she could pull off such a thing is by relying on the Rating Game rules favoring her, as I mentioned before. What Baraqiel and Dulio did does not apply to this discussion.

Rias' smarts are more of an informed attribute than anything else as she has never proven to be that smart with her actions, while Ravel has. If Rias can possibly trick Issei, Ravel is there to defend him and protect him from potential traps with how she manages the team due to being smarter than Rias.