Hi
I would also say, looking at the logs, if you want to contribute more healing for the meters: that you could use your AoE heals more in periods of intense raid-wide damage. (Do you have any mana issues?)
When raid-wide damage goes out, especially on a stacked group, a holy shock, holy radiance, holy shock, light of dawn combo is very effective in hogging the healing ;)
And I can't see where all your holy power healing is going - are you using it enough?
Grim