Pretty much having the same issue atm.
Tbh, at the moment I am blaming it on the fact I may be doing it wrong. Im'a run through what i'm doing and if someone could point me in the right direction that'd be lovely
As holy, I am spamming heal and pretty much only using chakra heal while helping to keep renew up on the target.
Trying to weave in the odd smite to get the wings mana return and improved healing.
CoH when there are more than 2 people taking dmg and maybe a renew on them.
FoL for those "oh shiiii" moments.
My main issue is just not having enough throughput to keep my tank up. (Partly due to trying to save mana with cheap spells) The tank is a warrior btw and we are comunicating through Skype so getting the CD rotations down isn't the issue. Most of the groups I feel the dps could be higher, but not by the amount where it'd prevent me going oom.
The issues only come from boss fights where I feel some of the mechanics are out to get me. For example the second boss of Grim Batol where he picks me up while i'm at 90% health and drops me to my death. Maybe thats just me not getting the tacs correct?
So yeah, sorry for Wall of Text but i'm loosing faith in priests...