- The DMG's guidance for how a CR rating works, has some pretty broad/vague rules for defense and offensive abilities. When you put them into practice, they work - sorta - but as the CR scales upward the more obvious the problem is with the DMG's formula.
- Work Around:Try to not modify the CR of a creature by +/-4 steps in the CR. If you do, you might wind up with a creature with a single attack that deals 320+ damage and a AC of 24+. To make it more functional, you should manually review and adjust the creature by adding additional attacks or traits.