For those of you not up on your Bernoulli Trials, for a 4x Shaman, you'll have:

47.8% chance to proc a Paralysis per lightning spell Volley
68.5% chance to proc a Frost Shock root per Volley

This will be dominating.

I think I'll be using a 52/0/19 build myself if these stay remotely similar to what I've seen in the calculator.