I'm fairly new to playing my priest, started during 3.3. I've succesfully healed wotlk raids without any trouble whatsoever. Now I recently started playing my priest again and managed to get it fully non-raid geared. It got pointed out that disc priests should also be using greater heal, which I didn't at first, given how bad it was in wotlk, and seeing how I already have 6 single target heals, I didn't really feel that it would be needed. Now I consider myself a very good DK, but I do have plenty to learn on my priest so I decided to get some help from the kind people on MMO-champion.
I do swap out glyphs depending on the fight, but this is my basic setup. Now here's my issue. Given how I started using greater heal, I'd really like the train of thought talent. Now my options of droppable talents are soul warding, strength of soul, inspiration and surge of light.
We generally run without a restoration shaman or a 2nd priest, so personally I don't find inspiration the best choise to drop.
TL;DR: What should I change in my spec.