LoT2 floor 13:

Okay. For reference, this guide is incomplete and mostly just explains how to get through the place, not documenting where items or events are explicitly (or what each item is) or anything else. I'm presuming the player explores areas before touching orbs, too, and thus I'm not giving explicit routing instructions to the shortcuts or the orbs.

Finally, all instructions will be given from the last given base temperature. I'm presuming you reset your temperature to that before making the next set of changes.

F13: Toggle orb in front of you, go through shortcut, toggle warp point, hit the orange orb. This resets you to 50C, which is where we want to be.

From the warp point, there are two easy-access orbs; one to the N that's +20, and one to the E that's +10. Toggle both and go into the shortcut N of warp point for a few scenes and an item. Then exit back out into the main section, have only +20 toggled, then go into the SE shortcut. Navigate to an item and the orb, which is +2, toggle it, leave back into the main section.

Without hitting the reset orb, toggle +10 on and turn +20 off, to be at 62C, then go into either of the shortcuts right near the warp point (they connect at the midpoint, the orb). Go through to the orb, toggle it for -4 (you should now be at 58C). You can't walk out of this section now, so go back to town and re-enter at the F13 warp point, then again without hitting the reset orb go up to the +10 orb and turn it off. You should now be at 48C: there's a shortcut E of the recall point you can take. Do so.

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Okay, from this point: BEFORE YOU LEAVE THE FLOOR, RESET THE ORBS IN THIS SECTION TO BE OFF/SO YOU'RE AT 48C. This way, you can return back here without having to do the onerous backtracking that will be repeating the above steps again.

There are three orbs in this section, clustered: the W one, which is +10, the S one, which is -6, and the NE one, which is +18.

From 48C (where you enter),
- Toggling +10 and -6 (for 52C) lets you into the SE shortcut, which leads to an item.
- Toggling +18 and +10 (for 76C) lets you into the NE shortcut, which leads to an item.
- There are two shortcuts to the north; one is straight north of the orbs, one is slightly to the east of the other. Toggling +18 and -6 (for 60C) gets you into the NNE one, which leads on with the plot. Toggling all three (for 70C) gets you into the N-most one, which leads to an item. Once you're done exploring this entire section, take the NNE shortcut to move on, and go up the stairs.

14F:
Hit warp point, rejoice.
NOTE: At this point, you can go back down the stairs, back to the three-cluster of orbs, and from the 48 degree point, toggle the -6 on, leave+re-enter at the F13 warp point, then enter the NW-most shortcut available from the warp point, which gets you to an item. If you're concerned about the temperature down here, leave + re-enter to 14F, go down the stairs and toggle -6 off.

Fully explore the currently-accessible section, avoiding anything that looks like a hole. (Spoilers; it's a hole down to 13F.) Once done, you should have the location of your next boss, as well as a warp to right next to them (both are S of the initial F14 warp).

1) The hole in the E-most section of the map from your first warp point drops down to an item.
2) The hole furthest to the SW from the original warp point also drops to an item.
3) Finally, the hole just NE of the new warp point also leads to an item.

Once you have those two and finished mapping, all that's left is the boss. He seems to be primarily HP-durable, and charges (buffing his Magic) before letting loose a MT Mystic nuke that may be undodgeable. He seems to be Dark and Phys weak, and neutral to everything else but Mystic, so Kasen, Yuugi and Sakuya can help here a lot whereas benching Marisa's near-inevitable. I had zero luck removing the buff with Tenshi, so your best bet is to equip Komachi to wall Mystic, sacrifice three others at the start of the fight, then have Komachi swap people in and out. With Regen, Komachi should heal to full before you see the blast again - he charges, blasts, charges, blasts, so you have plenty of time to unload your offense on him.

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F13

After the boss, warp back to 13F. The temperature should be 60C; if not, just reset orb, then toggle both +20 and +10 near the start orb. (If it is 60C, just toggle the +20.) After this, go into the shortcut N of warp point, as you can now get past the NE boulder and to... more orbs.

There are three orbs in this section, clustered: the W one, which is +8, the S one, which is -5, and the NE one, which is -7. In addition, the NW-most shortcut, which requires 88 degrees, has an orb that is -10.

From 80C (when you enter):
- Turn the -5 and the -7 orbs on, then go to the shortcut N of the orbs (a touch east) for an item.
- Without changing orbs from the above, you can go to the E shortcut for another item.
- Toggle the -5 and the +8 orbs on, then go to the shortcut in the center of this area (just NE of the orbs) for an event with Nazrin (presumably Byakuren recruitment-related).

Toggle the +8 on, go to the NW-most shortcut and toggle the -10 orb, return via shortcut to the orb cluster and toggle the +8 off.

From 70C (when you enter + the NW orb on):
- Toggle the -5 and the -7 orb on, then go to the shortcut just NW of the orbs for an item.
- Toggle the -5 orb on, then go to the N-NE shortcut to get to the stairs back to F14.

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F14

Toggle warp point. You're not done with temperature games yet! Reset orb to SW of warp point, S orb is -10, W orb is +7. There is also a far W orb that is +15. There is also, in the SW, a set of three holes very close together; info on those below.

From 50C:
-Hit the reset orb, go down either pit to the NW, then go to the shortcut to the extreme NE of the orb cluster for an item. (Hitting the reset orb resets the temperature on F13, as well.)
-Toggle -10 and +7, use W shortcut to get to an item.
-Toggle -10, go NW for an event with Nazrin. After you can remove this event successfully (there's a BP requirement), if you have the fourth scroll (a random drop, I found it on F14) you can go back to F13 behind the 80C shortcut N of the warp and move the rock/recruit Byakuren.
-This doesn't involve any of the orbs, but in the SW edge, there's three holes grouped very close together; take the SW-most one to drop down into an area with an item.

-Toggle +7, go to SW shortcut (just SW of the orb area) for an item. Then, go to the S-most shortcut in this area, go through. There's a split path between two holes, but the NW hole goes to the -4 orb on F13 - not somewhere that needs to be retread. Go down the SE hole.

F13

Explore this small section and go up the stairs on the other end.

F14

Explore this slightly larger section and go up the stairs on the other end.

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F15

Hit the warp point. This place has a lot to explore, so get on it. Avoid the numerous pits, and beware the FOE in the north!

-The FOE of the floor has a lot of row fire breath attacks, and a really quick ST physical. Fire resist helps a ton. He's weak to cold, and seems generic on defenses - but with his offense it'll be a damage race. He can be Slowed, which may help a ton - Paralysis doesn't seem to land, though.

-N of the start, there are three pits in a row, NW to SE. Jump into any of them and explore the area for an orb that's -8 (this is for F14, mind), a shortcut to the stairs that lead to 15F, and a boss - Yuyuko. Bring your SPI res and Death immunity!

Boss Fight: Yuyuko:
I lied, don't worry too much about ID - Suika and Aya are your most vital people as Wind is one of Yuyuko's biggest weak points, so they could use the insurance. Start the fight with Komachi and three scrubs, and wave goodbye as Yuyuko nukes everyone but Komachi. Swap people in and start nailing her with stat downs and heavy damage hits, and be ready to swap anyone out when Yuyuko's turn nears if you want them still alive. The fight goes much like any number of fights in LoT1 involving heavy switcher use. Of note, at around 33% HP, she starts charging for a move (probably Saigyouji Flawless again) so finish her fast or get people out before she gets the turn after the charge.

-There's another item you can get from here. Go to F14-West, hit the reset orb, go to F15, down the stairs, hit the -8 orb, warp back to F14-West, hit the -10 orb (the one S of the warp point), then go to the shortcut just N of the S-most shortcut (the one leading to the two pits) for an item.

-There's a set of two pits next to each other NW of the start of F15; go into the E one for an item. Go through the shortcut, explore the area, then take the pit for another item. Return back to this area, then take the stairs instead.

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F15, pt. 2

No waypoint? That's correct. Welcome to a bit of attrition exploration here. The waypoint is actually somewhat nearby - specifically, E and a bit S, right near the boss. I'd recommend exploring the rest of the floor before taking on the boss.

The boss tosses up a omnistatup on his first turn - Tenshi, if she's lucky, can strip most of that with one hit of her third skill. Aya to give Tenshi the turns she needs can help, too. This boss is tough, even with the buffs removed - weak to Fire but nothing else notable, very powerful spammable physical. At 50% HP he'll reapply his buffs and then nail your side with an omni-stat debuff. Chen and Ran are an amusing combo here - Ran can help dig people out of the debuffs, and Chen basically gets a free cleanse when Ran concentrates. Hina would also be a great boon here, especially with Old Lady Ohgane's Fire.

Once the boss dies, the first rock NE of the warp point in F13 will be movable. The one past it requires 72 achievements, and then there's a BP requirement for Reimu, Marisa, and Komachi before you can fight Eiki.

I believe this also lets you get past the rocks on the far east side of F15 (accessible via the initial F15 warp point). Doing so lets you meet Yukari.

Dropping down the closest pit to the east of the stairs gets you to an item. Dropping down the pit to the NE-most edge gets you to a new area and new stairs. Said stairs put you right within fighting range of the FOE, so be careful advancing.

Once you've cleared the FOE, you can free explore this sorta drab section.
-Dropping down the hole in the middle of the area leads to a section of F14 with an item.

At the far end, there's an H-shaped area with a hole in each leg. The NE hole leads to an item, whereas the N-most one leads to an area with stairs downward. Follow the relatively short zones back up to F14, and then to F15, and then... to the F16 waypoint.