User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-34061653-20181220051616/@comment-33939194-20181220100013

A guy name Syzorst posting the spoilers. Ravel planned to use Bova, Elmenhilde and Roygun to scout and try to make Rias burn up as much stamina as possible in her Balor form but they were ambushed. Rias launched a personal surprised attack in her Balor form, Lint, Strada and Kiba to take out Roygun and Bova. Also she used Gasper's bats to counter and destroy Elmenhilde's bats.

Rias went after Roygun because she was a major threat due to RG experience at endgame so she took her out early. Not a good start for Issei.

Also Rias planned to use Akeno, Kiba, Gasper and Koneko to deal with Asia but Crom insisted he will do so because he wants to fight Fafnir. Asia's BxB is keeping Crom at bay while Xenovia and Irina goes around to take out whoever they can.

Also Nikari retires Lint. Because Roygun was defeated, she used her ability as a time bomb setting on Lint so even if Nikari didn't beat Lint, she would've been retired anyway. So far Issei has lost 2 people and Rias lost 1. Issei team still have the advantage in numbers.