My "real" crit chance as you're calling it which is retarded since mark of the claw + shocklight is up 40%+ of the time is 56%. If I were so inclined and I could have that up to 58%. Even if you want to be pedantic and average out the 40% of the time my procs are up, it'd still average out to 59% sheet crit.
TLDR - high levels of crit are quite possible. I even explicitly stated it was 64% with concordance up.
If you don't count EOC procs... Well then I don't know what to do with you.