Wulf Ratbane said:But that's true of any group of PCs at any CR. Sometimes you're not equipped to deal with the critter, no matter what its CR says.
Wulf
Thanks! It just seemed strange that GT says a CR 21 encounter is moderately difficult (25% resources), while the DMG says CR 17 is the same for 8 Level 15 characters. There's quite a difference there.

Pinotage