One of the skeletons in Castle Scawl dropped a Battle Axe for me. I don't know if it's a random or a guaranteed drop, but it is a weapon that seems to be missing from this guide. It was on a bridge next to point 16 on Castle Scawl map.

@Rai Thank you for the corrections, I meant to fix the Aqueduct map earlier but it slipped my mind. I also added the information about William Patterson/Patrick Xersys to the Laetus Keep map!

Also, in Laetus Keep, Patrick Xersys will replace William Patterson at the lighthouse ONLY after a meeting with Wind Sage Ozin in the Abandoned Mine.

I dunno if you still wanted to update this but I figured out what happened to the Lyrian Aqueduct map (a duplicate number offsets everything by 1):

There's an extra 22 near the 23/24, which should be the Bottle of Sand (23).
23 is actually Locked Door (24).
24 is To Forgotten Temple (25).
25 is a Healing Sprig (26), & 26 is another Healing Sprig (27)
27 is the Steel Breastplate (28)
28 is the Hidden Door (29).

Thank you so much for making this guide!

Is there a map for the invisible path?

In the laetus keep castle had the large winged demon drop a cursed blade. The one in the room you go in right after you talk with the dude who drops dead.

for anyone that's interested, i made maps of the last 2 maps just for completeness sake, op you can include these in your list without credit if you want:
https://i.imgur.com/dsKRKfR.jpeg
https://i.imgur.com/knxZVa5.jpeg
[reposting because don't see edit button]
edit: i realized it'd be easier to map of the final map being out of bounds, so i made a basic cheatengine table to facilitate that, too lazy to remake the map myself but anyone else knock yourself out
for best use, add cheatengine as a non-steam game, duplicate lunacid totm's controller config to cheat engine in steam, freeze z values, set freeze interval to 8ms, then left trigger + forward/back to move north/south forcing through walls, left trigger + left/right for west/east, and most importantly left trigger + a/b to float up/down, this lets you access the oob roads in road of ruin
here's the table:
https://drive.google.com/file/d/1JUhbz-dqMigU_SkNYL-Kxn8PiN7Kbsl4

@HyperWing, good catch, something went screwy with the numbers. 29 should be where 28 is, meaning there's a number missing somewhere. I'll try to fix it as soon as I get a chance

Where is #29 in the Aqueduct? I don't see the number on the map.

Thank you so much for that!