My current spec looks like this
I don't care for critical reaction, because my healing style involves "feeling" how much heat I have/will generate with my next heal. I take the defensive style talents versus the alacrity ones, because with how much tertiary stat I'm allocated with 61/63s, surge gets capped so hard that I can put some enhancements into alacrity. Right now, I take a single point of System Calibrations because my gear isn't perfect, and I need to hit the sweet spot between 5.5 and 7.5% There is also tons of damage flying in TFB HM, and to a greater degree than other ops, a lot of healer damage. By taking less damage myself, I can focus better on the tanks and dps.