User blog comment:Crimson and Darkness/Volume 24 discussion blog/@comment-2602:306:CD9A:C860:E19A:D318:A9ED:19B2-20171223044203/@comment-124.120.105.139-20171223070347

At first glance, Ravel's strategies seem to be no different from Rias's usual battle plans (they both prefer brute force).

However, there are some distinctions between them.

Rias's combat doctrine centers around a direct charge toward enemies and tries to solve any kinds of problem along the way. (Old russian doctrine). Members of her team is so strong and have well-refined fighting skills. So as long as they don't commit any mistakes, Rias can wins the battle by simply pushing her team forward.

Ravel's combat doctrine focus on controlling battlefields with an overwhelming firepower (American Doctrine). In the other word, she want to dominate opponents by maximizing her team's advantages and minimizing advantages of the opposition team. In the match agaisnt Sona, Ravel advise Issei to blow up the map instead of trying to search enemies. This tactic forces Sona team to fight Issei's entire team directly since the divide-and-conquer tactic no longer possible in such a small area (Sona used this tactic when she fought Rias in Vol 5 and nearly succeed).