Quickleaf
Legend
12 sessions? That's a whole lot of time exploring Omu. Eep! I only have 7-8 sessions left to do Omu, the Fane, and the Tomb!I was happy to have the entire Omu map printed on one sheet of paper, and I probably got 12 sessions out of exploring the ruins. It was the highlight of the campaign and the Tomb exploration part isn't as fun I don't think.
Thinking of making Omu a faster-paced race to the puzzle shrines against Red Wizards for a few sessions, with the threat of Nightmare Haunting looming over them.
Then run the Fane as a 1-session scenario, either an "escape the dungeon", infiltration/rescue/theft, dungeon raid, or whatever approach the PCs take. Really focusing on making the threats in the Fane flow together like one massive running encounter, and on the brewing yuan-ti civil war. I've printed it out as a pieced-together poster map, which I'll cover with black construction paper.
And then the Tomb as a single expedition (i.e. no leaving to rest) cutting out the "drag" areas like the Mirror Tomb (19), the Sewn Sisters' trial rooms (72-76), and the hunting for glass eyes to access the Vault of the Beholder (44) since they're already hunting for skeleton keys (after gathering puzzle cubes!). I've printed each level out at 11x17, laminated them, and covered with DIY gold scratch-off paint – this seemed the most manageable way to handle mapping the large dungeon.