Crit Shaco is a trap. Let me give you a reference for the most reliable build (and guide) I know of.
https://www.youtube.com/watch?v=1aQe5CZgFfg
https://www.youtube.com/watch?v=59kSp25wFY4
^ DEFINITELY watch this one. Shaco is ridiculously strong in S5 soloqueue jungle.
Shaclone is some foreign D1/Master Tier Shaco main I found awhile back. He's probably up there with Lucent Shaco as the best Shacos in NA.
Crit Shaco, like i said, is a trap. I guess people see the crit effect on his q and think, well, I guess he synergises well with crit.
But really what you want is to be just tanky enough that your Burst is still enough to blow up squishies, but you can survive long enough for sustained DPS (as well as surviving long enough for your Q to come off cooldown. A bruiser shaco popping around and engaging fights with a clone is a lot scarier than a crit shaco that explodes in 2 hits as soon as he appear.)