I've posted a minor update to the Withstand effect by noting that critical damage ("Crit") cannot be Withstood. The effect now reads as follows:
Withstand
The affected character takes no damage from the next non-critical damaging attack(s) he or she receives, regardless of the amount of damage that they inflict. The character must declare "Withstood" after preventing damage in this way. The effect ends after a specific number of attacks have been prevented, as indicated by the action's tagline (e.g., Withstand 3 allows you to prevent the next three damaging attacks). Critical damage (i.e., damage with a "Crit" tagline) cannot be prevented, but does not count against the action's limit.
I am a fan of this. it allows crit users to not be nerfed while making withstand usable for PCs as well. Cant wait to see it implemented!