User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-201.42.176.84-20141124201004/@comment-4320546-20141124205255

This better not be you peinmaximus or so help me...
 * Cough*Anyway*Cough*

1-No. Don't forget that this is a Xenovia centric volume and that Strada is a problem that Xenovia herself had to handle, and that even Issei can lose to others. Strada was specifically mentioned to be as strong as Sairaorg and considering more than one person fought Strada in the Volume, you can't solely claim it as Xenovia winning by herself. That and the fact that Issei was busy using Penetrate, Bilingual, and Dress Break on Walburga.

2-No one knows for sure, and we won't until Shiva has more appearances. Just settle for the fact that he's most likely the number 2 in the top 10 if you include Ophis at full power.

3-IDK, either wait for more spoilers to come out when n0m@n feels like posting them and Jop transfers them over to here, or wait until Volume 19 is translated.

4-Same as above.