Don't get Holy Fire, 1 minute cooldown is fuckin' buns. Not to mention, as a healing spec, you don't want to be doing any damage.

As far as Holy Specialization (talent) goes, I've heard mixxed things on whether it works with healing spells or not. I mean, if it does, it's definitely a keeper. If it doesn't, then the talents could be spent somewhere in the discipline tree, possibly for reduction on instant cast spells.

So this baby seal walks into a club.