In fact I am wondering if Crit Buffs are really working. I have played with Canna a lot (because I like her), but the Crit rate is so abysmal her Skill seems completely useless.

Just so all are aware, according to the Jap Wiki Lupine has +10% crit chance. Not sure when nutaku will add the actual figures that DMM has for each crit chance girl but knowing them it might be a while.