The recent adventure Tomb of Annihilation released by WotC includes allies that can join the party. As an open-world adventure spanning multiple PC levels and Tiers, PCs could potentially gain allies more powerful than themselves such as the NPCs below.


Artus Cimber with his Ring of Winter (CR 7) Dragonbait (CR 5)

How does one calculate awarded experience when the PCs have allies that are more powerful than themselves in Adventurers League?

We are wondering if there is an official formula - something like:

Awarded_XP = Received_XP * (Expected CR)/(Actual CR)

As opposed to the answers to the question Determining "level" of an NPC ally for purpose of budgeting encounter XP - we are looking for official Adventurers League guidance or acceptable practices - not homebrew suggestions.


The rule for this is in the DMG p. 260:

If the party received substantial assistance from one or more NPCs, count those NPCs as party members when dividing up the XP.

The Adventurer's League DM Guide says:

Award XP as noted at the conclusion of the adventure. If you’re running one of the adventures published by Wizards of the Coast, it is up to you to calculate XP for your players. Otherwise, you’ll be provided with a guide on how to do that in a standalone D&D Adventurers League adventure.

None of the WotC adventures that I have seen (including Tomb of Annihilation) address this so the rule from the DMG applies.


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