Normally, my answer would be "screw the meters, people are alive, call it good." But lately I've been running a lot of pug raids where I'm getting nailed to the cross for my healing.
I find I'm competitive against Shamans, but get completely blasted out of the water by Druids and Paladins.
I don't know personally what I'm doing wrong. PoM every 10 seconds, CoH on Melee every CD, SoL procs used on whoever needs health. Renew on everything within reason without running OoM.
I don't feel its gear holding me back. Priests used to be on top when it came to healing and now I feel like the rear of the fail train.