After really putting a lot of thought into it, I think I'll go with PaMLLPr.

Reading about the additions to priest kit is pretty impressive for healing the group in a simpler fashion.

I'll hope that the blizzard on the mage will handle the snare. Given that I'm new to this, I want to make it as simple as possible for the first group and I believe PaMLLPr will do that. Plus, that saves my shammy to level in an eventual melee cleave group (if such a thing will ever again exist) or to level alongside a warrior and/or rogue in open world stuff later on.

Given my stable of toons and based on your guidance, I believe I am finally comfortable with where I'm headed!