User blog comment:Nearthel/Critical Strike and Penetrations overhaul/@comment-5266525-20150620182331/@comment-1330314-20150621102957

I disagree: I think the laning phase is the time where crits are the most problematic, since a) any crit you get at that point is going to be very small, and therefore very unstable, and b) due to the attritional nature of laning, one lucky crit can determine the outcome of a lane, and it's because of this that people often take a single crit chance mark. It's also why is difficult to balance and play successfully, since his early laning is super-dependent on cheesing the enemy with his crit chance, and basically comes up to a coin flip.