In any case, at a maximum skill level, if you were forced to not use skills and only holding down LMB, then you should balance. Otherwise, (like, when you're gonna be using skills) losing a bonus 1/8 damage for LMB in exchange for Crits all the time is a fantastic offer, and should be taken. Go for 100% Crits first, people. Oh, and do lots of practicing! Your stats won't count for anything if you can't avoid attacks. Because you'll be dead.