The NPC variant of the "Pathfinder by Roll20" (i.e. 1st Edition) sheet uses the wrong numbers for crit-confirm for attacks #5 and later. Here is my attack configuration: (In my testing, I set the critical range to 1 to have every attack be a critical threat.) Here is me hovering over the numbers for attack #4, which uses the correct mods (+21): Here is me hovering over the numbers for attack #5, where the correct mod (+36) was used for the to-hit, but the incorrect mod (+21, wrongly using the #4 value) is used for the crit confirm : The same problem happens across attack #5, #6, and #7 (and possibly later attacks, not tested).