Library Of Ruina

Note: I did this fairly late game so you might not have all the pieces for a while.

The main concept is this. We want to use Gebura's floor so that we can have access to Mountain of Corpses, an emotion page that eats all of your friends for 1 strength a piece. Therefore, you want all 4 in play so you can get max value.

It's worth choosing Red Mist as a key page, just so you can have access to Focus Spirit. Your addons for her will be Yuna: Lone Fixer, Carnival: Remembrance, and Shi Fixer: Kizuna. Those, once all trigger will be worth 7 strength.

Your other 4 friends can be a jumbo page that can absorb some damage, I recommend the rhinos from R Corp but this is more or less taste. For addons, I used Udjat for Hawk's Eye & Mirage, then Boris for Grit. We want them to stay alive until we throw them on the mountain.

Your deck for the 4 companions will be:
3 x Evade
3 x Dodge & Strike
3 x Stigmatize

Your deck for Gebura will be:
3 x Evade
3 x Dodge & Strike
3 x Focus Spirit

For battle, the "easiest" battle where you have all 5 librarians in play is the urban nightmare general invitation for Jeong's Office. (Note: your opinion may vary, that's where I did it). At this stage, you want to line folks up so they can absorb attacks with Evades & Dodge-Strikes, and you don't want them to win, just take it on the chin. You also want your stigmatizes to go unopposed if possible. As you rack up negative emotion, you'll have access to the red emotion pages, where your 3rd one should yield the Mountain Of Corpses jackpot. If all your friends were still alive, they all get thrown in the pile. On that turn, fire off 2x Focus Spirit on Gebura. Her next turn should trigger:

Mountain of Corpses for 4
2 x Focus Spirit for 6
Lone Fixer for 3
Remembrance for 2
Kizuna for 2

That adds up to 17 and a winner is you. It should pop immediately, so you can run away from the fight screaming at that point, given the odds of you winning with this setup is highly unlikely.