Even if you give the thieves very high evasion this doesn't seem to change. You could probably do that though (give enemies significant evasion across the board), so that this tiny disadvantage crit has doesn't grow because you sometimes already have more crit than the enemy has evasion.
Another thing you could do is use atk/(def/1.5) or something in the formula, and increase the 2 multiplier after that if need be, to take some power out of attack.
Also there is no reason for Joanne to take crit now. Probably a greater concern than fine-tuning atk/crt for non-mages
I feel a little bad for starting this nerd orgy of numbers.
