Illusion Connect: Story Collapse 17.19 | THREE STARS! Reaper Lineup
This video is an example how you finish Collapse 17.19; the unique thing about this stage is all enemy is Camille. The down side of it is your partner will get reflected damage everytime they attack, but the up side of it is you will get free rage!!!
The main point of how to clear this stage quick is by using your main AOE dealer and rack alot of rage so she can use unique skill again multiple time in one turn. Just don't forget to shield your main using your best tanker or healer.
In my case, I'm lining up my main Yuffie and Fenebeth (or Rotania) behind Anna. I only drop Shiki and Nicola only after there's 3 Camilla left in arena, don't use them to soon! Also you don't want them to remove the reflector either so I don't use Kasumi and only use Miyuki later.