Flesh sacrifice without the damage increase would be enough but might seems flavourless if it is only a +1 ap skill...
I have no problem with Wits stat for humans, their passive gives them 5% crit chance overall (2 from wits and +3 from the trait itself)
So for rogues it's not useful since they do crit with backstab but for Crossbow, 2 hander or mages with proper trait this is valuable.
