The better your gear, the less you need Innervate. The glyph is +20% benefit to you, so it's not a bad thing; it's merely a question of whether you can sacrifice the potential mana regen for additional healing.
LS and NG both benefit from your crits. Sure, from a theorycrafting perspective, NG may give you slightly more raw HPS for your buck, but you aren't the kind of healer who watches for crits and squeezes in that extra cast in the 0.5 sec the talent gives you. LS is entirely passive, making it like a free PoM whenever it procs. I like it better for tank healing, but again that's merely my preference.