Some Velious-era pre-Chardok warrior logs that suggest archery shouldn't have any flat damage bonus (maybe class or discipline specific?). Minimum damage is 1, minimal scaling with level, doesn't exhibit the crit behavior you're looking for, e.g. -
[Sun Sep 02 15:46:10 2001] Nina Scores a critical hit!(42)
[Sun Sep 02 15:46:10 2001] Sergeant Fjrak was hit by non-melee for 42 points of damage.
[Sun Sep 02 15:46:10 2001] You hit Sergeant Fjrak for 42 points of damage.
archery data
frequency graphs
source