Geez, I go do something else and people start calculating things.
Also, my numbers for the +damage.
On High AC bag with GK rifle I was crit 4507, regs 2625. Net benefit of a crit is +1882 damage. Assuming perfect crit stacking, 1% crit would be worth 18 damage.
On Low AC bag, I had crit 5332, regs varying 2477-3357 so average 2917. Net benefit of a crit 2415 damage. Again assuming perfect crit stacking, +24 damage.
Results may vary, of course, depending on the target AC. Now that I look at it too, the 2477 seems out of place. Maybe I had something running.