A lot of people don't know how to run this dungeon, so I decided to make a guide for it. However, this is based off of my experience running through it. I do not know if there are shortcuts I have missed, this is just how I clear the dungeon.
Also this guide is also very confusing, but the dungeon itself is confusing by default anyways! I tried my hardest to make it as least-confusing as possible so I apologize in advance for any inconveniences.
Since it is a huge picture, I will simply link it here:
And as a bonus, I have also recorded a video guide! It follows pretty much the exact same route as the guide I wrote. Please note the video is a normal Genbu run, true Genbu/Daisoujou is noted in the guide above.
Mmh, nice guide. And there is a thing I'd love to clarify: The person with Fuhito's branch (Hua Po's valuable given to you at the start of the dungeon) does not necessarily need to hit all switches. They will only need to hit until there is a message saying the the branch is full (in my case it's 7 switches). This very person is also the only one who can open the door leading to Dai room/true route, so better get an USO with ya :3 (And bells of contemplation too, but that's another story :3)
Also Ink, did you get those images from calmacera@fc2? If you did, better credit the poor guy for making an image guide ;;
"We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light." -Plato
After you clear one side on floor 2, you can head straight to the warp on the other side after pressing the first switch.
You don't need to go through warp C6, only C5. The door at (X22, y21) is unlocked by pressing the switch at (x26, y18), and the door at (x16, y21) is unlocked by clearing that room next to it. These doors give you easy access to both warps, which speeds up the run immensely as long as your party splits up to enter them.
You only need to hit the two switches beside D1 on floor 5 for normal genbu; doing so drops the stairs.
You don't need an ultimate summon orb for true genbu, in fact, daisoujou's debuff makes true genbu much harder. Just hit all the switches, then go to the door and use the Fuhito's branch.