Regarding critical damage with the revamp

376 ~ 578
Attack: 53 (31+12+10, Gun+Blessing+Bullets)
STR: 38 (37+1)
DEX: 161 (160+1)
Notes: No Crit skill, only Mastery. Spent about 30 minutes on each attack.
Mob: Green and Blue snails

~Attack~
Min non crit: 338
Max non crit: 519
Min crit: 444
Max crit: 760

~Double Fire (130%~
Min non crit: 440
Max non crit: 675
Min crit: 563
Max crit: 899

I was going to use just green snails, but I didn't notice any difference in damage on blue snails so I used them too.

Just from your observed criticals, you seemed to get about an average of 172.7 - 172.9 damage from criticals. Your average damage range is 477, or 429.3 adjusted for defense. 172.8/477 = 36.23%, 172.8/429.3 = 40.25%. I think criticals might be adding 40% defense-ignoring damage.

Edit: nevermind, doesn't fit