Leatherhead As for the Official published supplements, they are supposed to to be somewhat easy.
They are meant for use with the Adventurers league
From page 11 D&D adventure league v6.1 pdf about hardcover adventures
These adventures typically use the following ranges and can be played by characters of a higher level, provided they are within the adventure’s level range when they begin playing the adventure. A character is only “playing” one hardcover adventure at a time. For example, a character that starts playing CoS and then jumps over to an SKT game and advances outside of the level range for CoS can’t play that adventure anymore. This rule only applies to other DDHC adventures. Similarly, if an adventure directs you to run a specific portion of another hardcover adventure, the second adventure is considered the same adventure unless you continue playing it outside of the section referred to in the first. I’ve gone cross-eyed.
Levels 1-7 or 8-15. Used in HotDQ and RoT, these level ranges allow for mixed-tier parties.
Levels 1-10+. This level range is typical for most other hardcover adventures, and allows for mixed-tier parties.
Tiers. Tales from the Yawning Portal uses specific tiers of play for each dungeon instead of a single level range for the entire book, as follows:
• Sunless Citadel: Tier 1
• Forge of Fury: Tier 1
• Hidden Shrine of Tamoachan: Tier 2
• White Plume Mountain: Tier 2
• Dead in Thay: Tier 2
• Against the Giants: Tier 3
• Tomb of Horrors: Tier 3
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Lt zapp is doing his best not to see the any rebuttal. Now AL does not hand hold DMG about what to do when a group does any type of rest during an AL adventure which has a time limit. Through try and error, I found what best for me is for every short rest, reduce the time for the ritual by 2 rounds.